I've always be drawn to masks, ever since (and perhaps before) I went to Venice as a child and fell in love with the festival and mask shops there. I always take my sketch book when I go to galleries and museums and have amassed quite a collection of masks. The masks here are all painted wood.
Wellcome Collection: Medicine Man
British Museum: Gorgon (technically on a plate but would make a great mask)
Wellcome Collection: Indian Painted Masks