Hagia Sophia (; from the Greek Ἁγία Σοφία, pronounced , "Holy Wisdom"; Latin: Sancta Sophia or Sancta Sapientia), also known as the Holy Mosque of Grand Hagia Sophia (Turkish: Ayasofya-yı Kebir Cami-i Şerifi) and historically as the Church of Hagia Sophia (Church of Holy Wisdom),is a historic house of worship located in Istanbul that has served as a Greek Orthodox Christian patriarchal cathedral, a Roman Catholic cathedral, an Ottomanmosque and a secular museum. As of July 2020 the site has been decreed as a mosque by the President of Turkey. Built in AD 537, during the reign of Justinian, it was the world's largest interior space and the first to employ a fully pendentive dome. It is considered the epitome of Byzantine architectureand is said to have "changed the history of architecture".
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