Simplify the following text for a Grade 8 native English-speaking person.
Original: Over their stall , their heraldic devices are displayed : The Knight 's helm , decorated with a mantling ( cloth tied to the helpmet ) and topped by his crest ( often an animal ) .
Simplified: Perched on the pinnacle of a knight 's stall is his helm , decorated with a mantling and topped by his crest .