The Licchavi dynasty, of high-caste Hindu origin, ruled in the Kathmandu Valley from about a.d. 330 to 700.
The Licchavi dynasty ruled for about four hundred years. 
mnli hypothesis: The Licchavi dynasty ruled for about four hundred years.  premise: The Licchavi dynasty, of high-caste Hindu origin, ruled in the Kathmandu Valley from about a.d. 330 to 700.