Masallacin Hirami Ahmet Pasha ( Turkish: Hırami Ahmet Paşa Mescidi ) shine tsohuwar cocin Orthodox na Gabas da Ottomans suka canza shi zuwa masallaci. Kananan cocin, ɗayan daga cikin guda 36 da aka keɓe ga Saint John Maibaftisma a Constantinople, wani ɓangare ne na gidan bautar da ke da suna iri ɗaya. Cikakken sunansa shine Saint John the Forerunner by-the-Dome ( Greek: Ἃγιος Ἰωάννης ὁ Πρόδρομος ἐν τῷ Τρούλλῳ , Hagios Ioannis ho Prodromos en tō Trullō ),. Ita ce ƙaramar cocin Byzantine na Constantinople har yanzu tana nan kuma ba a taɓa nazarin ta ba. Ginin yana cikin Istanbul, a gundumar Fatih, a cikin unguwar şarşamba, ɗayan mafi yawan yankuna masu ra'ayin mazan jiya (na Islama ) na birni mai garu . Tana cikin Koltutçu Sokak, tare da wani ɗan ƙaramin fili, kewaye da sabbin gine-gine, ƙasa da 400 metres (1,300 ft) a kudu da rukunin gidajen Pammakaristos . Ba a san komai game da wannan cocin ba kafin mamayar Constantinople a shekara ta 1453. Elarin kiran "troullos" ( Latin trullus, Italian trullo, dome ) mai yiwuwa ya fito ne daga gidan sarauta da aka tabbatar da dome a da.