Hagia Sophia (English pronunciation: /ˌhɑːdʒə soʊˈfiːə/, /ˌheɪdʒɪə soʊˈfiːə/, /ˌhægɪə səˈfiːə/, /ˌhægɪə səˈfaɪə/, or /ˈhɑːɪə soʊˈfiːə/; from the Greek: Ἁγία Σοφία [aˈʝia soˈfia], "Holy Wisdom"; Latin: Sancta Sophia or Sancta Sapientia; Turkish: Ayasofya) is a former Orthodox patriarchal basilica (church), later a mosque, and now a museum in Istanbul, Turkey. From the date of its dedication in 360 until 1453, it served as an Eastern Orthodox cathedral and seat of the Patriarchate of Constantinople, except between 1204 and 1261, when it was converted to a Roman Catholic cathedral under the Latin Empire. The building was a mosque from 29 May 1453 until 1931, when it was secularized. It was opened as a museum on 1 February 1935.  http://en.wikipedia.org/wiki/Hagia_Sophia