1406:

Gregory XII Becomes Pope

Gregory was the last of the Roman line of popes during the Western Schism.

~538:

Gregory of Tours

1340:

Jean de France, duc de Berry

An enthusiastic patron of the arts, the duc is best known for comissioning the stunning book of hours, Les Très riches heures du duc de Berry.

1508:

Andrea Palladio

Generally considered the greatest architect of 16th-century Italy, Palladio designed elegantly graceful villas in Italy and wrote a revolutionary treatise on architecture.