GIA4759370 Two tax inspectors. Biccherna (cover of the accounting register of the city of Siena). National Archive - Museo delle Tavolette de Bicherna, Siena. Late 14th - early 15th century. by Italian School, (14th-15th century); Archivio di Stato, Siena, Italy; (add.info.: Two tax inspectors. Biccherna (cover of the accounting register of the city of Siena). National Archive - Museo delle Tavolette de Bicherna, Siena. Late 14th - early 15th century.); by Giancarlo Costa; Italian, out of copyright.