What to See Inside Hagia Sophia Istanbul? Discover the Interior

Entering Hagia Sophia is a bit like crossing the threshold of another era. It is not just a mosque, nor is it just a basilica: it is a living monument, a place that has absorbed and guarded centuries of power, spirituality and art.

Today, to visit the interior of Hagia Sophia in Istanbul is to explore a universe suspended between Byzantines and Ottomans, between Christianity and Islam, between emperors and sultans.

Every stone, every mosaic, every column tells a story. And it does so with a visual power that leaves one speechless.

Over time, Hagia Sophia has been:

• an Orthodox Christian cathedral (from 537 to 1453),
• an Ottoman imperial mosque (from 1453 to 1931),
• a secular museum (from 1935 to 2020),
• and today, again, an active mosque, but still open to the public along a dedicated route.

What is most striking, however, is what you find inside.

For this reason, in this article I will guide you to discover the interior of Hagia Sophia, helping you understand what you absolutely must see and how to navigate your way through the many historical and artistic elements that make this place unique in the world.

Want to start planning your visit already? Find out here how to purchase tickets to Hagia Sophia with priority access.

Architectural history of the mosque

The history of Hagia Sophia is a journey almost 1,500 years long.

It is not only the symbol of Istanbul, but also one of the most ambitious architectural works ever built. And the great thing is that much of this history you can read directly in its interior.

It all begins in 537 A.D., when Emperor Justinian I ordered the construction of a new basilica that would surpass every other existing church in splendor.

Two geniuses of the time designed the building: Antemius of Tralle, a mathematician, and Isidore of Miletus, an engineer. The result?

A huge church with a central dome that seems to float in the air.

But the history of Hagia Sophia was never linear. Before the present one, two other churches of the same name had been destroyed by fires and riots. The one we see today is the third version, but also the grandest.

In 1453, with the conquest of Constantinople by Muhammad II, Hagia Sophia was converted into a mosque.

This was the beginning of a new phase: minarets, a mihrab (the prayer niche), a minbar (the pulpit) and calligraphic medallions were added.

The Christian mosaics are partly covered, but not destroyed: it is also thanks to this choice that we can still admire them today.

In 1935, after the founding of the Turkish Republic, Hagia Sophia became a museum at the behest of Mustafa Kemal Atatürk.

This enables it to welcome millions of visitors every year and to show the world the incredible cultural stratification it holds.

It is finally converted back into an active mosque in 2020, but remains accessible to tourists through a paid tour route, mainly on the upper level.

As of January 15, 2024, this route is again open and designed to enhance both Byzantine and Ottoman elements.

The interiors of Hagia Sophia

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The central dome

When you enter the cathedral and look up, you cannot help but be enchanted. The central dome of Hagia Sophia is the most iconic and stunning element of the entire building.

An imposing structure that, despite centuries and earthquakes, continues to dominate space with an almost mystical lightness.

Built in the 6th century, the dome is 31 meters in diameter and stands 55.6 meters above the ground. For the time it was an architectural revolution: never before had such a large dome been built on a central plan.

The secret? The so-called spandrels: triangular elements that allow the transition from a square base to a circular dome. An ingenious system invented just for this structure, which influenced generations of architects, including Sinan, the famous Ottoman architect.

Today, looking at it from the upper level, you will notice 40 arched windows that follow its circumference. The light that filters through these openings creates the illusion that the dome is suspended in a vacuum.

It is an intended effect, designed to amaze worshippers and visitors from the very beginning.

During the Ottoman period, a very important decorative element was inserted right in the center of the dome: a verse from the Qur’an (Surah an-Nur, 24:35), written in Arabic calligraphy by Kazasker Mustafa Izzet Efendi, one of the most famous calligraphers of the 19th century.

This verse speaks of divine light, a theme perfectly in harmony with the visual effect created by the dome itself.

The Byzantine mosaics

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If there is one thing that makes Hagia Sophia unique, it is the coexistence of Christian art and Islamic architecture. And the visual heart of this fusion is the Byzantine mosaics.

True masterpieces that have survived fires, earthquakes, wars and even iconoclasm, that period when the depiction of sacred figures was banned and destroyed.

Today you can admire the mosaics mainly in the upper gallery along the current tour route. Many of them were covered with plaster during the Ottoman era, but never completely removed.

And this has allowed restorers to bring them back to light over the centuries.

Among the most spectacular ones are:

The mosaic of Deesis

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The Deesis one is probably the most exciting.

It depicts Jesus in the center, with the Virgin Mary and John the Baptist on either side, intent on interceding for humanity on judgment day. The faces, full of sorrow and humanity, are extraordinary in their expressiveness and pathos. It is located in the south gallery and dates from the 13th century.

The mosaic of Empress Zoe

A work that combines politics and faith. It shows Christ enthroned, flanked by Empress Zoe and one of her husbands (replaced several times over the centuries!).

The inscription above the heads tells who the protagonists are. It is a perfect example of the use of religious art for dynastic purposes.

The mosaic of the Comnenus

Made between 1122 and 1134, it shows John II Comnenus, his wife Irene and son Alexius offering gifts to the Virgin Mary with baby Jesus. Also located in the upper gallery.

The Virgin in the apse

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You can’t miss it. This mosaic is located in the semi-dome of the apse, just above the Ottoman mihrab. It depicts Our Lady with Jesus on her lap, while on either side are Constantine and Justinian, offering the city and the church, respectively.

It is one of the strongest visual symbols in all of Hagia Sophia.

These mosaics, composed of tiny pieces of stained glass and gold leaf, are among the most precious testimonies to Byzantine art in existence in the world.

And they are only visible from the upper museum route, so be sure to include them in your visit.

Islamic elements

After the conquest of Constantinople in 1453, Hagia Sophia changed its face. From a Byzantine cathedral it became an Ottoman imperial mosque, and this marked the beginning of a new layering of symbols and meanings.

The interior was enriched with Islamic elements, which today are perfectly integrated into the building’s grand visual narrative.

Mihrab and minbar

One of the most fascinating aspects of the interior of Hagia Sophia is the way Christian sacred architecture has been reinterpreted according to Islamic tradition.

And this is especially evident when looking at the mihrab and minbar, two central elements in every mosque.

The mihrab is the semicircular niche carved into the wall that precisely points to the qibla, that is, the direction of Mecca toward which Muslim worshippers turn during prayer.

At Hagia Sophia, the mihrab is located right in the center of the ancient Byzantine apse, but in a position slightly offset from the original axis of the basilica, precisely to align with Mecca.

This small architectural detail is telling of a momentous transformation: not erasing the past, but adapting it to new religious needs.

The mihrab is richly decorated with geometric motifs and Koranic inscriptions in the Ottoman style, carved on white marble. Next to it are two bronze lamps, a gift from Sultan Suleiman the Magnificent, which used to be lit during services.

Next to the mihrab stands the minbar, or raised pulpit from which the imam delivers the khutbah (sermon) during Friday prayers. This is also a typical element of mosque architecture.

That of Hagia Sophia is a masterpiece of the 16th century, built during the reign of Sultan Murad III.

It is carved in snow-white marble, with a tapered staircase and a small dome at the top, and decorated with arabesques and verses from the Quran.

Mihrab and minbar are not only functional elements: they are tangible signs of Islamic spirituality, harmoniously inserted into the original architectural context of the church.

The contrast between the Byzantine solemnity of the apse and the Islamic sobriety of the mihrab creates a most powerful visual impact.

Stop for a moment and look at them closely. You will realize that this is not just art, but living history carved in stone.

The large calligraphic medallions

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As soon as you enter the main nave of Hagia Sophia, you cannot ignore them. There are eight of them, huge, imposing, suspended as if defying gravity: the Ottoman calligraphic medallions are among the most scenic and spiritually charged elements of the entire building.

Each of these medallions is a masterpiece of Islamic calligraphic art, measuring about 7.5 meters in diameter. They were made in the mid-19th century during the major restoration promoted by Sultan Abdulmecid I.

Kazasker Mustafa Izzet Efendi, one of the best-known masters of the time, was in charge of the calligraphy, while the structural work was directed by brothers Gaspare and Giuseppe Fossati.

Engraved on these medallions, in beautiful gold lettering on a dark green background, are eight fundamental names of Sunni Islam. They are Allah and the Prophet Muhammad, followed by the four well-led caliphs (Abu Bakr, Umar, Uthman and Ali) and the Prophet’s two grandsons, Hasan and Husayn.

The arrangement of these names along the pillars and walls of the nave creates a perfect symbolic balance, blending sacred language with architecture.

The medallions are made of linden wood, a light but durable material ideal for supporting such large surfaces. Despite their monumental size, they seem to be suspended in the void, in perfect harmony with the lightness of the dome that towers above the room.

These medallions are not part of the original Byzantine Hagia Sophia, but today they are considered inseparable from its current face.

They are a tangible sign of the transformation into a mosque, but also of the desire to integrate and not erase the past.

The visual and spiritual presence they emanate is powerful, almost magnetic. Seen from the upper level, they become even more fascinating because of their proportions and the dramatic effect they create in the interior space.

Observe them quietly, from multiple angles.

They are the visual essence of the Ottoman era inside Hagia Sophia, a perfect example of how art and faith can merge into one extraordinary harmony.

Other Ottoman elements

The lustration urns of Pergamon

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Walking down the main aisle, it is easy to come across two huge marble urns. These are the lustration urns, which came to Hagia Sophia in the 16th century at the behest of Sultan Murad III.

They are carved from a single block of white marble from the ancient city of Pergamum in Asia Minor.

These urns, which can hold up to 1250 liters, had a practical and ritual function: during Islamic holy nights sherbet, a sweet and aromatic drink, was dispensed through small taps installed at the base.

On ordinary days, however, they were used for ablutions before prayer.

Today they represent a perfect synthesis of liturgical functionality and monumental decoration, symbolizing the great Ottoman attention to every detail of sacred space.

The Ottoman Library

In the 18th century, a library was set up inside the mosque to house religious manuscripts and Quranic texts.

It is a cozy but elegant space, decorated with carved wood, stucco and Quranic inscriptions, and designed as a place of study, meditation and knowledge.

The presence of a library inside a place of worship reflects the Islamic view that knowledge and spirituality should walk together. It was not uncommon for worshippers, before or after prayer, to stop and read or transcribe sacred texts.

Today, this environment is one of the most significant of those added during the Ottoman era, and testifies to the importance of religious culture in daily practice as well.

The sultan’s meeting place

In Ottoman times, Hagia Sophia was not only a mosque but also the imperial prayer place. For this, a reserved space, called the sultan’s lodge, was made.

This is a small elevated tribune, decorated with marble and inlaid grilles, from which the sultan could attend religious services in a discreet and protected manner.

The lodge was designed to provide security, privacy and visibility, and reflects the sultan’s central role in the religious sphere as well. He was not only a political leader but also the defender of the Islamic faith.

This space is a perfect example of how Ottoman architecture knew how to shape the liturgical space around the figure of the ruler, without altering the overall harmony of the structure.

The mosaic tughra of Abdulmecid I

One of the most original additions is the mosaic tughra of Sultan Abdulmecid I, inserted during the 19th-century restorations led by the Fossati brothers. The tughra was the official and stylized signature of the sultan, a symbol of his power and authority.

In this case, the tughra was made as a golden mosaic, using the original Byzantine tiles recovered during the works.

The result is a fascinating hybrid object: an Islamic sign made with a Byzantine technique, uniting two worlds visually and symbolically.

The tughra is set in a frame of blue and green mosaics, and is considered one of the most significant symbols of the artistic encounter between East and West.

Columns, marble and fine materials

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One of the most striking aspects of the interior of Hagia Sophia is the extraordinary quality of the materials used.

Every wall, column, or floor tells of a work built to astonish and last through the centuries. It is not just architecture: it is a manifesto of power, spirituality and artistic refinement.

The columns, more than a hundred in total, are a load-bearing element not only in a structural sense but also in an aesthetic sense. Some are monolithic, carved from a single block of stone.

Others are composed of several pieces, but all come from every corner of the Byzantine Empire. Materials include white and green marble, red porphyry, and Egyptian granite, and many of these columns were reused from ancient temples such as that of Artemis in Ephesus or from ruined Roman buildings. This reuse technique, called spolia, was common in large imperial buildings, but here it reaches spectacular levels.

Walking through the corridors and women’s galleries, you will notice that the columns are not all the same. Some have finely carved Corinthian capitals, others show carvings with plant or geometric motifs, the result of the more evolved Byzantine aesthetic.

Not only do they support the imposing dome and upper galleries, but they create rhythm and harmony in the space, accompanying the visitor on a fluid and solemn journey.

The wall and floor coverings also deserve attention. They are made of precious marbles inlaid with mirrors, using a technique that involves cutting individual slabs and juxtaposing them specularly to create symmetrical, undulating patterns.

The effect is mesmerizing.

Each slab has an unrepeatable pattern, and the natural veins of the stone look like abstract works of art.

This type of workmanship was typical of imperial palaces and important religious buildings, and Hagia Sophia represents one of its highest expressions.

In the center of the nave, a circular space inlaid with colored stones marks the omphalion, or the place where Byzantine emperors were crowned. This detail makes the political and symbolic character of each decorative choice even more evident.

In Hagia Sophia, matter becomes message. Marble, porphyry, and granite are not just building materials, but tools to communicate grandeur, eternity, and sacredness.

And the amazing thing is that many of these materials, after almost 1,500 years, are still there. Intact. Shiny. Ready to tell you their story.

Upper gallery and vantage points

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Today, if you visit Hagia Sophia, the tour route will take you almost exclusively to the upper level. This is where the current itinerary for tourists is developed, which was reorganized in 2024 to ensure respect for religious services and, at the same time, offer a complete cultural experience. And let’s face it: it’s a privileged vantage point.

The upper gallery runs along the sides of the building and offers a spectacular view of the nave. From here, you can really realize the immensity of the dome, the complexity of the architectural proportions, and the skillful balance of light, materials, and symbols. Looking down will make you feel suspended between time and space.

But the gallery is not just a vantage point. It is also the heart of Byzantine artistic heritage.

It is in these rooms that you find the most valuable mosaics, including the Deesis, the mosaic ofEmpress Zoe, the mosaic of John II Comnenus, and the rare portrait ofEmperor Alexander. Many of these mosaics had been covered with plaster during the Ottoman period and only re-emerged with the restorations of the 19th and 20th centuries.

From here you can also appreciate the arrangement of the calligraphic medallions, which seem to float in space, perfectly integrated into the environment. And you can calmly observe the details of the columns, capitals and friezes that, from the ground, would easily escape.

In addition, information panels in Turkish and English have been installed along the route, accompanied by QR codes.

By scanning them with your smartphone, you can access multimedia content and audio guides in 23 languages, including Italian. It is a modern and engaging way to discover history without burdening your visit.

The gallery is also the place to take unforgettable photos, thanks to the natural light filtering through the dome windows and the play of shadows between the columns. You’ll feel like you’re in a time machine, where every detail tells of centuries of faith, art and power.

Remember that access to the upper level is included in the paid museum tour. Be sure to reserve your priority ticket in advance on the tickets page.

Interior of Hagia Sofia: unusual places and details

Hagia Sophia is one of those places where, even after hours, you notice something new. Not everything is immediately visible, and some of its most fascinating secrets are hidden right in the folds of space.

Here are some places and details that are often overlooked but absolutely must be discovered.

The Empress Lodge

Inside the upper gallery, in an elevated and strategic position, is what is traditionally identified as the Empress Loggia.

From here, Byzantine empresses attended religious services without being seen, separated from the people but perfectly immersed in the sacred space.

The loggia is recognizable today for its privileged position and the elegance of the balustrade that surrounds it.

It is one of the most historically charged spaces, speaking of court rituals and imperial sacredness.

The marble door

Among the most striking corners of the south gallery is a marble door dating back to the 6th century.

This is no ordinary door: it was used to separate the area designated for the emperor from the area open to the clergy.

Legend has it that one side represents heaven and the other represents hell.

It is a work of art carved in marble, with complex decorative motifs and a function that combined architecture, liturgy and power.

Viking carving

Yes, you read that correctly: a Viking graffito inside Hagia Sophia. In the south gallery, engraved on the marble parapet, is an inscription in the runic alphabet that reads:

Halvdan was here

It probably dates back to the 9th century, when some Vikings served as mercenaries in the Byzantine emperor’s variaga guard.

This small detail is an amazing window into a multicultural era, where even a warrior from the North left his mark on one of the most important churches in the Christian world.

The Tomb of Enrico Dandolo

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On the floor, near the Deesis mosaic, you will notice a plain slab with an engraved name: Henricus Dandolo.

He was the doge of Venice, one of those responsible for the sack of Constantinople during the Fourth Crusade in 1204.

He died in Istanbul and was buried just inside the basilica.

Enrico Dandolo’s tomb is a silent reminder of one of the most controversial pages of medieval history, still a subject of debate among historians and travelers.

The seraphim of the dome

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At the base of the central dome, six-winged angels, the so-called seraphim, are depicted in the four corner spandrels.

For centuries their faces were hidden under large Ottoman medallions.

But in 2010, during restoration work, the face of one of them was finally brought to light.

Today you can admire it up close and notice the minute detail of the face and wings, the result of extraordinary artistry.

Conclusion

To visit the interiors of Hagia Sophia is not simply to enter a historic building: it is to immerse yourself in a living, layered, powerful narrative. Every surface, every column, every mosaic tells you about faith, empire, conquest, and art, in a continuous dialogue between past and present.

Whether you are an architecture enthusiast, a curious traveler, or a simple lover of beauty, you will find something in Hagia Sophia that will strike you to the core.

It is not a place to visit in a hurry: walk slowly, look up, observe the details, be surprised by the contrasts and harmonies.

From the grand dome to the Byzantine mosaics, from the Ottoman medallions to the Empress’ loggia, each element contributes to an experience beyond history and beyond religion.

It is a space that unites humanity in its ability to create, believe and remember.

If you are planning your visit, don’t forget to buy tickets online to avoid the long lines and access the upper path directly.