Thomas Ashby and Luigi Villari, 1911 Encyclopædia Britannica (1911)
“ The main art centres of Tuscany are Florence, Pisa and Siena, the headquarters of the chief schools of painting and sculpture from the 13th century onwards. While the former city, however, bore as prominent a part as any in Italy in the Renaissance, the art of Pisa ceased, owing to the political decline of the city, to make any advance at a comparatively early period, its importance being in ecclesiastical architecture in the 12th, and in sculpture in the 13th century. ”
