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,
Valley of the Thracian Rulers Valley of the Thracian Rulers The Valley of the Thracian Rulers is a popular name which was made public by the archaeologist Georgi Kitov and describes the extremely high concentration and variety of monuments of the Thracian culture in the Kazanlak Valley. It is believed that there are over 1500 funeral mounds in the region, with only 300 being researched so far. The Kazanlak Tomb was discovered in 1944. Between 1948 and 1954 the ancient town of Seuthopolis was studied. Between the 1960s and the 1980s people made researches of the mound necropolis which belonged to residents of Sevtopolis. Another