[1] He strengthened his political powers by marrying Chandralakshmi, daughter of Jagajjaya Malla, the king of Kantipur.
It was during the time of Vishnu Malla that the Gorkha Kingdom and Tanahun started intervening in the politics of Kathmandu Valley and would end after being annexed by Prithvi Narayan Shah, the Gorkha king.
Rajya Prakash was the third son of Jagajjaya Malla, the king of Kantipur.
[4] He had been expelled from his family's kingdom by his brother Jaya Prakash Malla who succeeded their father as the king of Kantipur.
Rajya Prakash succeeded Vishnu Malla to the throne of Patan after the latter's death in 1745.