A staircase in Prague Castle was built wide & shallow for mounted knights to enter for this competition
[DOC] [TLE] Old Royal Palace - Prague Castle for visitors [PAR] The original residence building, mostly wooden, was built at Prague Castle 
already ... is formed by the Riders' Staircase, built originally to enable knights to 
enter the hall on horseback in order to take part in the jousting competitions held 
in it.