Foundations of geometry different sets of axioms for Euclidean geometry, any of these can replace the Euclidean parallel postulate. The following partial list indicates some of these theorems that are of historical interest. Absolute geometry is a geometry based on an axiom system consisting of all the axioms giving Euclidean geometry except for the parallel postulate or any of its alternatives. The term was introduced by János Bolyai in 1832. It is sometimes referred to as neutral geometry, as it is neutral with respect to the parallel postulate. In Euclid's "Elements", the first 28 propositions and Proposition I.31 avoid using the parallel postulate,
Serapeum of Alexandria Serapeum of Alexandria The Serapeum of Alexandria in the Ptolemaic Kingdom was an ancient Greek temple built by Ptolemy III Euergetes (reigned 246–222 BCE) and dedicated to Serapis, who was made the protector of Alexandria. There are also signs of Harpocrates. It has been referred to as the daughter of the Library of Alexandria. The site has been heavily plundered. The site is located on a rocky plateau, overlooking land and sea. By all detailed accounts, the Serapeum was the largest and most magnificent of all temples in the Greek quarter of Alexandria. Besides the image of the god, the