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,
Islamic rulers in the Indian subcontinent himself independent. Nawab of Awadh ruled parts of current day Uttar Pradesh. Hyder Ali and Tipu Sultan briefly held power in Mysore kingdom. Many princely states other than Hyderabad had Muslim rulers. Islamic rulers in the Indian subcontinent Beginning in the 13th century, several Islamic states were established in the Indian subcontinent in the course of a gradual Muslim conquest in the Indian subcontinent. This process culminated in the Mughal Empire, which ruled most of India during the mid-16th to early-18th centuries. The Islamic rule gradually declined due to the dominance of Maratha Empire and several other rebellions (case during