Complex sentence: Masquerades and masques were a common form of courtly theater in the 14th century, and at the time of Isabeau's masque the depiction of folkloric wild men was an acceptable theme in the literature of noble society.
Split into simpler sentences: Masquerades and masques were a common form of courtly theater in the 14th century. At the time of Isabeau's masque, the folkloric depiction of wild men was an acceptable theme in the literature of noble society.