A form of scaphe dial in which the dial is in the form of a chalice or cup, usually of metal. The hour lines are engraved on the inside of the cup, and the time is shown by the shadow of the tip of a pin-gnomon which usually rises vertically inside the chalice. Chalice dials may be either direction or altitude dials. If a direction dial it has a built-in magnetic compass, used to set it in position; if without a compass, the interior walls of the chalice are divided into twelve equal compartments identified by the names of the months or the corresponding zodiacal signs. In use the dial of the chalice sundial is set so that the shadow of the gnomon lies within the month of use. The earliest known chalice dial is dated 1554 and signed by Bartholomew, Abbot of Aldersbach, near Passau, Bavaria.