Mosque

Osman Reis Mosque

After its initial construction, it underwent many years of repairs.
It was rebuilt in an eclectic style by Alexandre Vallaury in 1903 for Ahmed Afif Pasha.
In 1958, its courtyard and additional buildings were expropriated during the construction of the İstinye-Yeniköy coastal road.
It was damaged in the 1999 Marmara earthquake and was repaired by the Sabancı family.

The square-planned building, also known as the İstinye Mosque and the Yalılar Mosque, has a masonry structure, a wooden roof, wide eaves and a glass-fronted entrance.
The use of yellow and white colors gives movement to the facade. There is a basement on the north side due to the difference in elevation.
It is decorated with hand-carved tiles. The mihrab niche is decorated with gold gilding; the minbar and the preacher’s pulpit are made of white-painted wood.
On the right side, there is a small stone minaret with a single balcony.