Липпо Мемми
The six decorated bays of the right aisle, with scenes of the New Testament, pose a problem of authorship. Giorgio Vasari states that they are the work of "Barna of Siena" and relates that Barna fell to his death from the scaffolding. The name "Barna" in relation to paintings at the Collegiate Church of San Gimignano appears to have originated in Lorenzo Ghiberti's "Commentaries". In 1927 the archivist Peleo Bacci made the suggestion that Barna had never existed and that the paintings are the work of Lippo Memmi. This hypothesis received no support and little comment for fifty years. In 1976 discussion of Bacci's attribution was revived, with Moran suggesting that there had been a mis-transcription of "Bartolo" as "Barna", with the name "Bartolo" referring to Bartolo di Fredi, painter of the Old Testament cycle.