Hagia Sophia is widely considered one of the most outstanding architectural achievements in the world and has a long and rich history that has contributed to its fame. Here are a few reasons why Hagia Sophia is so famous:

Architecture: Hagia Sophia is a stunning example of Byzantine architecture and is known for its massive dome, which was the largest in the world when it was built and remained the largest until the construction of the Florence Cathedral in the 15th century. The building also features intricate mosaics, marble pillars, and other ornate decorations.

History: Hagia Sophia has a long and storied history that spans over 1,500 years. It has served as a cathedral, a mosque, and a museum and has been a symbol of both Christian and Muslim faith.

Cultural significance: Hagia Sophia is an important cultural and historical site that has played a role in developing art, architecture, and religion in the Byzantine and Ottoman Empires. It has also been a significant tourist attraction for centuries.

Iconic status: Hagia Sophia is an iconic and instantly recognizable building featured in numerous works of art, literature, and media. Its iconic status has contributed to its fame and cultural significance.