Complex sentence: The 16th-century south transept has windows in the south and east walls: the south window has three lights topped with trefoils in a 16th-century arch, and the east window is small and rectangular, using some dressings from the 14th century.
Split into simpler sentences: The 16th-century south transept has windows in the south and east walls. The south window has three lights topped with trefoils in a 16th-century arch, and the east window is small and rectangular, using some dressings from the 14th century.