Just screens of the 8 different castles designed for the Emir.
The extensions for the Lookout Towers can easily block in the landscape. Mangonels are placed on the one or two front Round Towers.
Castle 3 suffers from a bug. There is no armoury but an armourer's workshop. (The Emir uses only fletchers.) So the weapons workshops are set to sleep. - Compare Phillip 6 for the same mistake.