Ancient Greek and Japanese theatre masks are often grotesque in appearance, with wide, leering or horrified mouths. In theatre, the over-exaggerated facial features allow the characters and their emotions to be seen and understood by audiences in large theatres, as well as helping to distinguish between different characters. They could also add to a sense of comedy and tragedy. In festivals and ritual, the mask can represent a particular hero, god, spirit or legendary animal, and evoke or convey different atmospheres and emotions. Masks could also be used as votive offerings, left at a particular god’s shrine or temple.