My current project is an extension to the Medieval Castle (31120). This is phase 1 of the extension.
I really like the design of the castle so I've tried to implement and develop (copy) as much of the current design as possible whilst adding to it.

This is how it connects to the current set

Sideview of Armory, Royal Mint and Alchemist Tower

Armory with side access

Royal Mint

Royal Mint 2

Alchemist Tower

Alchemist Tower 2

Hidden trapdoor, with mechanism, to inescapable jail

Inescapable Jail

Alternative View
Currently working on phase 2 consisting of a working portcullis gate, the Great Hall and Royal Home