| Kalenderhane Mosque | |
|---|---|
 The Mosque viewed from the southeast in 2012 | |
| Religion | |
| Affiliation | Sunni Islam |
| Year consecrated | 1746 |
| Location | |
| Location | Istanbul, Turkey |
  Location in the Fatih district of Istanbul | |
| Geographic coordinates | 41°00′47″N 28°57′37″E / 41.013132°N 28.960304°E |
| Architecture | |
| Type | Church with Greek cross plan |
| Style | Middle Byzantine - Comnenian |
| Completed | 12th century |
| Minaret(s) | 1 |
Kalenderhane Mosque (Turkish: Kalenderhane Camii) is a former Eastern Orthodox church in Istanbul, Turkey, converted into a mosque by the Ottomans. With high probability the church was originally dedicated to the Theotokos Kyriotissa. The building is sometimes referred to as Kalender Haneh Jamissi and St. Mary Diaconissa. This building represents one among the few extant examples of a Byzantine church with domed Greek cross plan.