Stables/1.03.24

Knights
Although the Stables produced cavalry units, because the Knights focus heavily on them, the Stables can also be considered a second core production building. Although Knight Champions will be the units mostly produced from them, plenty of Stables will be needed to play effectively to the Knight's strength. A couple of Stables at the back of your base should be used for Knight Lords and generally forgotten about (because their production time is incredibly lengthy), another two to four for Knight Champions and maybe even another one or two for the basic Knights when you need to quickly pump out some reliable units.

The Stables can also research Warhorse, a skill that improves the combat score for the Knight's cavalry units. This cheap skill doesn't take long to research but obtaining it prior to any cavalry units will delay their production and instead research it while your army is already out and on the trot.