Swayambhunath (Devanagari: स्वयम्भूनाथ स्तुप; sometimes romanized Swoyambhunath) is an ancient religious complex atop a hill in the Kathmandu Valley, west of Kathmandu city. It is also known as the "Monkey Temple".Swayambhunath, is among the oldest religious sites in Nepal. According to the Gopālarājavaṃśāvalī Swayambhunath was founded by the great-grandfather of King Mānadeva (464-505 CE), King Vṛsadeva, about the beginning of the 5th century CE. This seems to be confirmed by a damaged stone inscription found at the site, which indicates that King Mānadeva ordered work done in 640 CE.