Complex sentence: The temple on Denawaka and Kehelbaddala river basin was called Dronawakka Viharaya during the reign of King Vijayabahu I. The Nampotha (a book written in the Kandy period about important Buddhist centers) mentioned this temple as a 203rd temple as a Denawaka viharaya.
Split into simpler sentences: The temple on Denawaka and Kehelbaddala river basin was called Dronawakka Viharaya in the King I Wijayabahu period. The nampotha (the book written in Kandy period) mentioned this temple as a 203rd temple as a Denawaka viharaya.