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It’s a church. It’s a mosque. It’s Hagia Sophia.

One of the most iconic and historically significant structures in the world

TheOtherTour by TheOtherTour
August 19, 2025
in Documentary, Istanbul Attractions, Istanbul Travel Blog, Istanbul Videos
Reading Time: 7 mins read
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Introduction

Hagia Sophia, or Ayasofya in Turkish, is one of the most iconic landmarks in Istanbul, Turkey, and a symbol of its rich and complex history. Originally built as a Christian cathedral by the Byzantine Emperor Justinian I in the 6th century, it later became a mosque after the Ottoman conquest in 1453, and then a museum in 1935 by the order of Mustafa Kemal Atatürk, the founder of modern Turkey.

What's so special about Hagia Sophia?

The Hagia Sophia is not just a building; it is a living testament to the shifting tides of religion, power, and culture over the course of nearly 1,500 years. Its magnificence and symbolism captivate scholars, architects, and travelers alike.

Here are some key aspects that make it special:

THE CENTRAL DOME

Hagia Sophia

Is Hagia Sophia’s dome truly the world’s greatest—or does Rome’s Pantheon overshadow it? Raised on ancient columns, scarred by riots and conquests, it still stands defiant. Brace yourself for a glimpse into the dome that changed history—and continues to fuel an age-old architectural debate.

Learn more

Architectural Innovation and Grandeur

Hagia Sophia was built in 537 AD during the reign of Byzantine Emperor Justinian I. Its design broke new ground in architectural innovation, especially with its massive dome. The dome, considered an engineering marvel, measures 31 meters in diameter and seems to float above the building thanks to the unique construction techniques used.

Religious Significance

Originally a Greek Orthodox Christian cathedral built in the 6th century, Hagia Sophia has served as a central place of worship for multiple religions over the centuries.

Image Source: NY Times

It was converted into an Ottoman mosque in the 15th century after the conquest of Constantinople by Mehmed the Conqueror.

In 1935, it was secularized and turned into a museum by the Republic of Turkey, and in 2020, it was reconverted into a mosque. This layered religious history makes it a symbol of both Christian and Islamic heritage.

Artistic Beauty

The interior of Hagia Sophia is adorned with magnificent mosaics, frescoes, and Islamic calligraphy. The mosaics, many of which date back to the Byzantine era, depict various religious figures and scenes. When it was converted into a mosque, these mosaics were plastered over but later restored when it became a museum.

Cultural and Historical Significance

The transition of Hagia Sophia from a church to a mosque, and later to a museum in 1935 by the secular Turkish Republic, reflects the region’s tumultuous history and the interplay of different religions and cultures. Each phase of its existence has left an imprint, making it a palimpsest of Byzantine, Ottoman, and modern Turkish history. As a museum, it served as a symbol of secularism and a bridge between the Christian and Islamic worlds.

However, in 2020, Hagia Sophia was controversially reconverted into a mosque, sparking debates about its role and significance. This decision was seen by many as a step back from secularism, raising concerns about the preservation of its artistic and historical treasures, and sparking international criticism about the politicization of cultural heritage.

Throughout its history, Hagia Sophia has been more than just a physical structure; it’s a symbol of shifting powers, religious tolerance (and sometimes intolerance), and the intersection of East and West. It stands as a testament to the rich, diverse, and often contentious history of a region at the crossroads of continents and cultures.

A Unique Structure

Hagia Sophia’s unique blend of Christian and Islamic elements, its grand scale, and its rich history contribute to its status as one of the world’s great architectural achievements and a symbol of Istanbul’s diverse heritage.

Haghia Sophia exterior

Hagia Sophia was not only a masterpiece of Byzantine engineering and art, but also a symbol of imperial power and religious devotion, a witness to many historical events and changes, and a source of inspiration for many artists and architects.

Entrance fee to the museum

Tourists pay a €25 fee to explore the 1,500-year-old cultural and religious landmark in Istanbul. The change, aligned with UNESCO’s guidance, aims to preserve the site, separating tourists and worshippers.

The new entry fee, effective this month, accompanies separate entrances for worshippers and tourists, along with a headset system providing multilingual commentary. Türkiye‘s initiative seeks to enhance site preservation, visitor experience, and crowd control.

2025 Update: Hagia Sophia's Hidden Underground World Will Open to Visitors

The work is under way
This is fantastic news

Starting in 2025, visitors to Hagia Sophia can explore its newly accessible underground sections, including ancient cisterns, tunnels, and a three-room tomb. These areas, hidden for centuries, offer a deeper insight into the monument’s 1,500-year-old history.

The restoration and cleaning process, still ongoing, ensures the preservation of these architectural marvels while improving the monument’s overall stability and ventilation. This new access promises to illuminate the rich legacy of both Hagia Sophia and Istanbul.

Conclusion

The cathedral/mosque was designed to impress and awe the visitors with its sheer size and beauty, and how it served as a link between heaven and earth, God and humans. Hagia Sophia with its multiple identities and meanings, and invites us to appreciate and respect its historical and cultural significance beyond any religious or political affiliation.

Hagia Sophia Tours

Metin Koca, a professional tour guide in Istanbul

If you are interested in learning more about Hagia Sophia and other hidden gems of Istanbul, check out The Other Tour and our creative and off-beat approach to tourism. We offer private tours that focus on local experiences, storytelling, and social impact, and that avoid the typical tourist traps and clichés.

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Tags: ArchaeologyArchitectureByzantine LegacyChurchConstantinopleEuropean SideHagia SophiaHistoryIslamic HeritageIstanbulIstanbul ToursIstanbul TripIstanbul VisitMosqueMuseumsReligionSultanahmetUnderground

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