Minecraft wiki entry for End_City, associated text: Some end city rooms are structured similarly to traditional Asian pagodas. Jeb had visited the Summer Palace before the release of 15w31a.[2][3]
The banners atop the towers have a magenta and black pattern that resembles the missing texture:
End cities can be over 100 blocks tall.
End cities and bastion remnants are the only places where players can find enchanted diamond gear, and one of only two ways to obtain them other than by enchanting, the other being trading with a weaponsmith, toolsmith, or armorer villager.
On the end ship, there is a hole in the crow's nest atop of the mast, which is directly above a piece of magenta stained glass on the ship's deck. This is a relic feature from the early days of the ship's development, when the main loot inside the ship was a beacon that shoots its beam through the magenta glass and the hole in the crow's nest, creating a magenta beam. Although the beacon was replaced with the elytra, the magenta glass and the hole remained unchanged.