The ancient Egyptian Single-Stair hieroglyph, Gardiner sign listed no. O40 is a single staircase in the Gardiner subset for "buildings, parts of buildings, etc." A second full double-staircase is no. O41,〔Betrò, 1995. ''Hieroglyphics: The Writings of Ancient Egypt'', Double stair, p. 186.〕 O41