Nizamia observatory is an optical observatory established during the reign of the Nizams of Hyderabad state in 1908. It was established in Ameerpet, Hyderabad. It participated in the Carte du Ciel making 4,63,542 observations. It currently lies unused on the premises of the Osmania University campus in Hyderabad, India. It boasted of an 8" Cooke Astrograph and a 15" Grubb refractor telescope.
Its founder was an England-educated rich noble man Nawab Zafar Yar Jung Bahadur, the youngest son of Sir Khursheed Jah Bahadur, who was the minister for defence in the Nizam's government. Taken over by the government in 1907, the observatory for years worked on an ambitious programme of photographing and charting a large segment of the sky.