The Caesareum of Alexandria is an ancient temple in Alexandria, Egypt. It was conceived by Cleopatra VII of the Ptolemaic kingdom, the last pharaoh of Ancient Egypt, to honour her first known lover Julius Caesar or Mark Antony.The edifice was finished by the Roman Emperor Augustus, after he defeated Mark Antony and Cleopatra in Egypt. He destroyed all traces of Antony in Alexandria, and apparently dedicated the temple to his own cult. Converted to a Christian church in the late 4th century, the Caesareum was the headquarters of Cyril of Alexandria, the Patriarch of Alexandria from 412 to 444.