The building was originally constructed as a Byzantine church in the 12th century, dedicated to Christ Pantocrator. It was part of a larger monastic complex and served as an important religious site during the Byzantine period.

The Zeyrek Mosque is a historic mosque located in the Zeyrek neighborhood of Istanbul. It is notable for its architectural significance and rich history. After the Ottoman conquest of Constantinople in 1453, the church was converted to a mosque. The mosque is recognized for its architectural beauty and historical importance, representing a blend of Byzantine and Islamic architectural styles.

It is an excellent example of Byzantine architecture, featuring a cross-in-square plan typical of Byzantine churches. The structure is characterized by its two large domes and a series of smaller semi-domes. The interior retains some of its original Byzantine elements, including beautiful mosaics and frescoes, although many were covered or removed during its conversion to a mosque. The mosque’s walls are adorned with intricate decorations, and the overall layout reflects both Byzantine and Ottoman influences.

Today it is part of the UNESCO World Heritage Site of the Historic Areas of Istanbul and is an active place of worship and is also open to visitors. It is less crowded than some of Istanbul’s more famous mosques, offering a more tranquil experience for visitors interested in the city’s rich religious and architectural