Here are some nice LEGO versions of essential medieval buildings from Age of Empires II by a group of LEGO enthusiasts. An Archery Range by Mark of Falworth and Barracks by Andrew JN above, and a few more below. Great designs (with very good rooftops!) and with the old-school minifigs added, these builds remind me of the '90s LEGO castle sets.
Mill by Dunedain98
Market by David FNJ
Mining Camp by Aaron Gomez
Docks by soccersnyderi
Blacksmith by Michael the Juggler
Barracks interiors by Andrew JN