Mosque in the Parthenon.
Conversions occurred primarily during the life of Muhammad and continued during subsequent Islamic conquests and under historical Muslim rule. As a result, numerous Hindu temples, Somnath, Churches, Synagogues, the Parthenon and Zoroastrian temples were converted into mosques.
Zorastrian belief that body is the Temple of God.
Hagia Sophia, Turkey. Church converted to Mosque after the fall of Constantinople.
Somnath Temple in Gujarat, India.