Z-plan castle
Z-plan is a form of castle design common in England and Scotland. The Z-plan castle has a strong central rectangular tower with smaller towers attached at diagonally opposite corners. Prominent examples of the Z-plan include Brodie Castle in Moray, Castle Menzies in Perthshire, Glenbuchat Castle in Aberdeenshire, Castle Fraser in Aberdeenshire, Claypotts Castle in Dundee and Hatton Castle, Angus, Scotland. A variant on the Z-plan is the C-plan, in which the two smaller towers are attached at adjacent corners of the main tower.