Heliopolis (ancient Egypt) from him the true length of the year and month, upon which he formed his octaeterid, or period of 8 years or 99 months. Ptolemy II had Manetho, the chief priest of Heliopolis, collect his history of the ancient kings of Egypt from its archives. The later Ptolemies probably took little interest in their "father" Ra, and Alexandria had eclipsed the learning of Heliopolis; thus with the withdrawal of royal favour Heliopolis quickly dwindled, and the students of native lore deserted it for other temples supported by a wealthy population of pious citizens. By the 1st century BC, in fact,
Monarchs, Rulers, Dynasties and Kingdoms of the World Monarchs, Rulers, Dynasties and Kingdoms of the World Monarchs, Rulers, Dynasties and Kingdoms of the World: An Encyclopaedic Guide to More Than 13,000 Rulers and 1,000 Dynasties from 3000 BC to the 20th Century is a non-fiction work by R.F. Tapsell, published in 1983. It is a comprehensive record of kings, queens, sultans, and emperors all in a single volume. It includes many dynasties that are rarely described except in advanced studies of individual countries or regions. The relationship of each monarch to his or her predecessor is provided which enables the reader to construct a rudimentary family tree. The