> a dark day that was in 1453 <
Another dark day was 1923. The Ottoman Turks were on the losing side of WW I, and in 1918 Constantinople was occupied by the Allies. The map should have been redrawn to give the city to Greece. As it was, the Turks resisted any such change. So in 1923 the Allies gave up the city. Another Islamic victory over the West.
https://en.wikipedia.org/wiki/Occupation_of_Constantinople#End_of_the_occupation
I believe until 1915 or so Constainopole was a majority Christian City
never trust the english