Guglielmo Ebreo is the best known dancing master of the fifteenth century, owing to the survival of seven manuscripts containing versions of his dance treatise De pratica seu arte tripudii (On The Practice or Art of Dancing), as compared to one copy each of the only other treatises from the fifteenth century written by Domenico da Piacenza and Antonio Cornazano. In the early 1460s, while Guglielmo Ebreo (William the Jew) was in the employ of the Sforza court in Pesaro and was a frequent visitor at the Sforza court in Milan, he decided to convert.....