Madrid Codex
... that the Madrid Codex, one of only three surviving pre-Columbian Maya books, contains almanacs and horoscopes that were used to assist Maya priests in their ceremonies?
... that the <b id="mwAZk"><a href="./Madrid_Codex_(Maya)" id="mwAZo" rel="mw:WikiLink" title="Madrid Codex (Maya)">Madrid Codex</a></b>, one of only three surviving pre-Columbian <a href="./Maya_codices" id="mwAZs" rel="mw:WikiLink" title="Maya codices">Maya books</a>, contains almanacs and horoscopes that were used to assist <a href="./Maya_priesthood" id="mwAZw" rel="mw:WikiLink" title="Maya priesthood">Maya priests</a> in their ceremonies?