The fascinating character heads of Franz Xaver Messerschmidt

Today, I had occasion to remember the incredible face-pulling busts of Franz Xaver Messerschmidt (February 6, 1736 – August 19, 1783), which I first saw in the late 1980s when I saw them at a museum in Vienna, Austria. A Google Image search for Franz Xaver Messerschmidt is a treat for girning aficionados.