Lippo Memmi
Because of the wide variations in style and quality in the New Testament paintings in San Gimignano it is believed that they were the work of three or four distinct painters. It is further believed that Vasari's dating of the New Testament scenes was incorrect as on stylistic grounds they should be dated to the period 1330-1340s. Because of these problems with the identification of the artist a majority of scholars now believe that ‘Barna’ is a historical fiction. This conclusion has generated various theories on the authorship of the San Gimignano frescoes. The view is that the Collegiata frescoes and other panel paintings attributed to the artist are all closely linked to the work of followers of Simone Martini and the circle of Lippo Memmi.