Prithviraja III, popularly known as Prithviraj Chauhan or Rai Pithora, was a king from the Chauhan (Chahamana) dynasty who ruled the territory of Sapadalaksha, with his capital at Ajmer in present-day Rajasthan. Ascending the throne as a minor in 1177 CE, Prithviraj inherited a kingdom which stretched from Thanesar in the north to Jahazpur (Mewar) in the south, which he aimed to expand by military actions against neighbouring kingdoms, most notably defeating the Chandelas.

Ajmer is one of the major and oldest cities in the Indian state of Rajasthan and the centre of the eponymous Ajmer District. It is located at the centre of Rajasthan. It is also known as heart of Rajasthan. The city was established as Ajayameru by a Chahamana ruler, either Ajayaraja I or Ajayaraja II, and served as their capital until the 12th century CE.