Term: Mensuration symbols (feb 17, 1280 – oct 19, 1590)
Description:
those circles and half circle thingsthe precursor to modern time signature
was NEEDED due to actions from the Ars Nova. Older modes used triple time (for the holy trinity) and NOW it's 2 or 4.
Added to timeline:
Date:
feb 17, 1280
oct 19, 1590
~ 310 years