Who were troubadours? what was their music like?

a French medieval lyric poet composing and singing in Provençal in the 11th to 13th centuries, especially on the theme of courtly love.

A troubadour was a composer and performer of Old Occitan lyric poetry during the High Middle Ages (1100–1350). Since the word troubadour is etymologically masculine, a female troubadour is usually called a trobairitz.

If he tries to grape you then get a grape and grape him back

Perspective is important because it enabled the 3 dimensional world to be translated into the 2d world of the picture plane. this had an immediate impact on the representation of reality in art and design.