Rider in ceremonial garb rides white Arabian horse, also wearing ceremonial blankets and tassels.
A traditionally dressed horse and rider at a parade.
Ceremonial garb is usually traditional. The rider and horse are wearing ceremonial garb.
The rider in ceremonial garb and a horse in ceremonial blankets and tassels explains the horse and rider are traditionally dressed. The man riding the horse implies the parade.
A rider on a horse wearing ceremonial blankets and tassels would be traditionally dressed for a parade.