Explanation:

The Katyuri kings were a medieval ruling clan of present-day Uttarakhand, India. They ruled over the region now known as Kumaon from 800 to 1100 AD. They called their state Kurmanchal, the land of Kurma, the second avatar of Vishnu, from which the present name is derived. Their capital was Kartripura.

The Katyuri dynasty was founded by Vashudev Katyuri (sometimes spelled Vasu Dev or Basu Dev); the ancient Basdeo temple in the city - the oldest stone temple in Uttarakhand - is attributed to him. His reign is most commonly believed to be from 850 to 870 Ad.The Kingdom was then named Jyotiryana, and had its capital at Joshimath in the Alaknanda Valley.Vasu Dev was of Buddhist origin, but later started following Brahminical practices. The brahminical practices of Katyuri kings in general is sometimes attributed to a vigorous campaign of Adi Shankara (788-820 CE).