Complex sentence: The architectural designs of these buildings have since been studied by leading sinologists and experts in traditional Chinese architecture, such as Nancy Steinhardt, who classified them according to the hall types featured in the "Yingzao Fashi" Chinese building manual written in the 12th century.
Split into simpler sentences: The architectural designs of these buildings have since been studied by leading sinologists and experts in traditional Chinese architecture, such as Nancy Steinhardt. Steinhardt classified these buildings according to the hall types featured in the "Yingzao Fashi" Chinese building manual written in the 12th century.