Central Library (UNAM) based on the mexica cosmogonical belief that the shape of the universe is composed of two joined ellipses. This one features Tlaloc glyphs related to tonalpohualli, the most important ritual calendar of the mexica people. Said calendar was the center of their celebrations and their astronomical calculations. The finishing stroke to this side of the mural is an image of the myth concerning the founding of the city of Mexico-Tenochtitlan. Central Library (UNAM) The Central Library of the National Autonomous University of Mexico (UNAM), is the main library in the Ciudad Universitaria Campus. It holds one of the largest collections
Unam sanctam Unam sanctam On 18 November 1302, Pope Boniface VIII issued the papal bull which historian Brian Tierney calls "...probably the most famous of all the documents on church and state that has down to us from the Middle Ages." The original document is lost, but a version of the text can be found in the registers of Boniface VIII in the Vatican Archives. The Bull lays down dogmatic propositions on the unity of the Catholic Church, the necessity of belonging to it for eternal salvation, the position of the Pope as supreme head of the Church, and the duty thence