Sancaktar Hayrettin Mosque, Byzantine monastery turned mosque in Kocamustafapaşa, Turkey
The Sancaktar Hayrettin Mosque features brick construction with alternating ashlar courses and an irregular octagonal shape with a cross-shaped interior layout.
Originally part of the Byzantine Monastery of Gastria, the building transformed into a mosque following the Ottoman conquest of Constantinople in 1453.
The structure represents the architectural transition between Eastern Orthodox and Islamic traditions, maintaining elements from both religious building styles.
The mosque stands five hundred meters northeast of Kocamustafapaşa railway station on Teberdar Street, surrounded by numerous artisan workshops.
The building contains an eastern-oriented apse and maintains its original Palaiologan period masonry techniques from the medieval Byzantine era.
Location: Istanbul
Architectural style: Byzantine architecture
Made from material: brick
GPS coordinates: 41.00275,28.93467
Latest update: March 6, 2025 09:13
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