Complex sentence: The building was originally designed by Uk Sameth of the School of Vann Molyvann in the late sixties, in the "New Khmer Architecture" style, functional but with clear Khmer elements.
Split into simpler sentences: The building was designed by Uk Sameth of the School of Vann Molyvann in the late sixties. It was designed in the "New Khmer Architecture" style, functional but with clear Khmer elements.