mixed media (watercolour, ink, markers). the original is pretty big, so it's much nicer than the scan. i read about chess pieces the other day and apparently the rook has associations to the giant mythological bird rock (appearing in the stories about sinbad, and other places too i believe - i loved hearing about rock when i was little). that seemed like an interesting thing. apparently, this piece is also known as "the chariot" in some languages, hence the wheels.