Church of St. Mary of the Mongols - Credit: Wikimedia Commons
Saint Mary of the Mongols (full name in Greek: Θεοτόκος Παναγιώτισσα (pr. Theotókos Panaghiótissa, lit. "All-Holy Theotokos") or Παναγία Μουχλιώτισσα (pr. Panaghía Muchliótissa); Turkish name: Kanlı Kilise (meaning: Bloody Church), is an Eastern Orthodox church in Istanbul. It is one of the only remainingMamboury (1953), p. 221. Byzantine churches of Constantinople that has never been converted to a mosque, always remaining open to the Greek Orthodox Church. Read more on Wikipedia
Source: en.wikipedia.org