>until the fall of Constantinople

It converted into a mosque in 1453 and remained as a mosque for five hundreds of years, which I would call a quite long time.

Also it was turned into a museum as part of laicité policies, not as a "compromise" between Christians and Muslims. It's also noteworthy that Muslims accounted for 98.32% of population in 1935.

It was a mosque and turned into a secular museum only in 1935 by a dictator though. Would you also suggest that entire vatican city should be turned into some kind of secular museum?