The God King is a 1974 BritishSri Lankan historical film directed by Lester James Peries. The film is based on the historical clash between brothers Kasyapa and Moggalana on Sigiriya Rock.
King Kasyapa Leigh Lawson is the son of King Dhatusena Geoffrey Russell. Kasyapa murdered his father by walling him alive and then usurping the throne which rightfully belonged to his brother Mogallana Ravindra Randeniya, Dhatusenas son by the true queen. Mogallana fled to India to escape being assassinated by Kasyapa but vowed revenge. In India he raised an army with the intention of returning and retaking the throne of Sri Lanka which was rightfully his. Knowing the inevitable return of Mogallana, Kasyapa is said to have built his palace on the summit of Sigiriya as a fortress and pleasure palace.Mogallana finally arrived and declared war. During the battle Kasyapas armies abandoned him and he committed suicide by falling on his sword. ........
Source: Wikipedia