Hirami Ahmet Pasha Mosque

Hirami Ahmet Pasha Mosque Hırami Ahmet Paşa Mescidi
The Mosque viewed from the east with the apse in foreground as of 2007[update]
Basic information
Location	Istanbul, Turkey
Geographic coordinates	41°01′40.28″N 28°56′44.84″E / 41.0278556°N 28.9457889°E / 41.0278556; 28.9457889
Affiliation	Sunni Islam
Year consecrated	Between 1587 and 1598
Architectural description
Architectural type	church with cross-in-square plan
Architectural style	Byzantine
Completed	12th century
Materials	brick, stone

Hirami Ahmet Pasha Mosque (Turkish: Hırami Ahmet Paşa Mescidi) is a former Eastern Orthodox church converted into a mosque by the Ottomans. The small church, one among the 36 dedicated to Saint John the Baptist in Constantinople, was part of a monastery bearing the same name. Its full name was Saint John the Forerunner by-the-Dome (Greek: Ἃγιος Ἰωάννης ὁ Πρόδρομος ἐν τῷ Τρούλλῳ, Hagios Ioannis ho Prodromos en tō Trullō). It is the smallest Byzantine church of Constantinople still extant and has never been studied.

The building lies in Istanbul, in the district of Fatih, in the neighborhood of Çarşamba, one of the most (Islamic) conservative areas of the walled city. It is located in Koltutçu Sokak, along a small square, surrounded by new buildings, less than 400 metres (1,300 feet) to the south of the complex of the Pammakaristos.

Nothing is known about this church before the conquest of Constantinople in 1453. The appellation "troullos" (Latin trullus, Italian trullo, dome) probably comes from a dome-roofed palace that used to be in the neighborhood. The style of construction dates the building to the 12th century.