Constantinople conquered by Mehmed II in 1453.
Reasons: Byzantine was therat for Ottomans
Mehmed’s dad murad too want conquer Constantinople. For that he was built a fortrett called Anadolu Hisarı. Mehmed II too bulit a fortress in European Side called Rumeli Hisarı also known BoÄŸazkesen.
Byzantine emperor Constantin built Byzantie walls and put a big rope in Golden Horn prevent Ottoman ships attacks. But Ottomans invented Great Turkish Bombard (a big cannon) and destroyed Byzantine Walls and conquered Constantinople.
Results:
Lots of science man and artists went Italy. It caused renaissance.
East Rome defeated.
Ottomans lands combined.
Ottomans became leader of Islam World.