Context: The Medieval period includes music from after the fall of Rome to about 1400. Monophonic chant, also called plainsong or Gregorian chant, was the dominant form until about 1100. Polyphonic (multi-voiced) music developed from monophonic chant throughout the late Middle Ages and into the Renaissance, including the more complex voicings of motets.

Question: The Medieval period begins with the fall of what city?
Answer: Rome

Question: What can Plainsong or Gregorian chant also be called?
Answer: Monophonic chant

Question: What does Polyphonic mean? 
Answer: multi-voiced

Question: When did Monophonic chant stop being the dominant form?
Answer: 1100

Question: Polyphonic music included more complex voicing of what?
Answer: motets