The fall of Constantinople is depicted with paintings, models and artifacts at the Military Museum.
This is the chain the defenders used to block the mouth of the Golden Horn. During the Fourth Crusade, some 200 years earlier, the walls on that side of town were the first to collapse, leading to the defeat.
The Ottomans were unable to break the chain (yellow) but they came up with an interesting solution: they built a wooden road (red) around the Galata fort. They pushed their ships off the water on that road, thus circumventing the chain. This undermined defender’s morale and severed an important supply route from neutral Galata.
The museum exhibits a nice collection of weaponry, armor (for combat and ceremony) and artillery.
Click to see high res the Turkish version of the Armenian and Cyprus issues. Summary: a small enemy that can’t be defeated must be a terrorist AND the occupation is, in fact, a liberation!