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,
Economy of ancient Tamil country Economy of ancient Tamil country The economy of the ancient Tamil country (Sangam era: 200 BCE – 200 CE) describes the ancient economy of a region in southern India that mostly covers the present-day states of Tamil Nadu and Kerala. The main economic activities were agriculture, weaving, pearl fishery, manufacturing and construction. Paddy was the most important crop; it was the staple cereal and served as a medium of exchange for inland trade. Pepper, millets, grams and sugarcane were other commonly grown crops. Madurai and Urayur were important centers for the textile industry; Korkai was the center of the pearl