Symbols standing for royal lineages and their domains in the Maya civilization; a Maya glyph identifying a place or polity. Each of the principal Maya cities had its own hieroglyph, which appears in inscriptions of all kinds. All such emblem glyphs share the same prefix, but the main element varies from one city to another. Many of these glyphs can now be linked to specific sites; others have still to be identified. They were first discovered in 1958.