Taddeo di Bartolo, Siena's premier painter in the years around 1400, is the focus of a cultural history of a great Italian school in an understudied period. His patrons commissioned important fresco cycles and the most impressive polyptychs of the age. In part a travelogue, the text follows Taddeo (ca 1362-1422) from training in straitened times at Siena across central and northern Italy. Ten years of itinerancy drew him to various Tuscan centers,...