File:Donato da Cascia, Squarcialupi.jpg

Summary
Donato da Cascia and his music, from the Codex Squarcialupi.

Cf. File:Donato da firenze.jpg

Source: https://www.facsimiles.com/fileadmin/_processed_/wmimages/csm_005560_Detailbild_7a706997e3-120fc1688b.jpg