Complex sentence: Traditional Cambodian circus artists had failed to maintain a national cultural presence despite proof illustrating their existence prior to the fall of Angkor in 1352: sculptures on Ba Puon temple, Angkor Wat temple & the Bayon temple all depict images of traditional circus arts.
Split into simpler sentences: Traditional Cambodian circus artists had failed to maintain a national cultural presence despite proof illustrating their existence prior to the fall of Angkor in 1352. Sculptures on Ba Puon temple, Angkor Wat temple & the Bayon temple all depict images of traditional circus arts.