Lippo Memmi
The New Testament cycle of frescos in the Collegiate Church of San Gimignano, though to date from the 1340s, are now generally attributed to Lippo Memmi. Traditionally they were attributed to Barna of Siena, but it is thought now that this artist never existed, even though the attribution dates from the writing of the Renaissance art biographer Giorgio Vasari. Vasari took the name from an earlier work by Ghiberti, but it is thought that "Barna" might have been wrongly transcribed from "Bartolo", and referred to Bartolo di Fredi who painted the Old Testament cycle in the opposite aisle of the church. This suggests that other works attributed to Barna could be works of Memmi and thus his stylistic adherence to Simone Martini is less binding.