USA, February 4, 2024 (X, amit agarwal): Hundreds of churches were reconverted from mosques in Greece and other Eastern European countries in 1900s, without opposition. This X post has eleven examples. The first is on the Greek Parthenon, originally a pagan temple. In the 6th century it was converted to a Church, then in the 15th into a mosque. That mosque was demolished in 1932 after Greek independence.
X post: https://x.com/amit1119/status/1754078315617698244?s=20
see also:
https://en.wikipedia.org/wiki/Parthenon_mosque
https://www.quora.com/Is-it-true-that-there-was-a-mosque-inside-the-Parthenon-during-the-Ottoman-era