Note 17 — THE PRECURSORS OF BACH FRESCOBALDI—FROBERGER—PACHELBEL—BUXTEHUDE
Wallace Goodrich translation
The circle, possessing neither beginning nor end, conveys the impression of the infinite, of perfection. This perfection is attributed to the number three; according to Franco of Cologne, the chief number, because of the Trinity, "vera et summa perfectio." (Musica et cantus mensurabilis, Chap. IV.)