Conversation so far:
What is heraldry?
Heraldry is a broad term, encompassing the design, display, and study of armorial bearings, as well as related disciplines together with the study of ceremony, rank, and pedigree.
When did the Moors first appear?
Maures appear in European heraldry from at least as early as the 13th century
What role did the Moors play in Europe?
Moors—or more frequently their heads, often crowned—appear with some frequency in medieval European heraldry, though less so since the Middle Ages.
What else can you tell me about heraldry besides when the Moors appeared?
Moors are also sometimes called moore, blackmoor, blackamoor or negro.
What does the moors head look like?
The arms of Pope Benedict XVI feature a moor's head, crowned and collared red, in reference to the arms of Freising, Germany.

Question: What are they?
Self-contained rewrite: What are Moors?