Florentine School. Active first half of fourteenth century. In 1339 Jacopo was one of the founders, along with Bernardo Daddi and others, of the painters' Corporation of St. Luke in Florence. Vasari says that he was a pupil and assistant of Taddeo Gaddi, whom he resembles stylistically; but he was also influenced by the Master of St. Cecilia, by Giotto, and later by Bernardo Daddi and Sienese painters. He was perhaps the most prolific panel painter in fourteenth century Florence. Undoubtedly, he made much use of studio assistants.