This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Belle bonne sage modern.svg Baude Cordier early th century with annotations regarding rhythmic notation techniques cf original manuscript File CordierColor reset as File Belle bonne sage mensural svg MIDI rendering File Belle bonne sage ogg including lower voices own Future Perfect at Sunrise cczero Uploaded with Baude Cordier