The Enigmatic Bernardo Bertini: A Florentine Echo in Tuscan Frescoes Bernardo Bertini (c. 1330 – 1380), a Sienese painter whose identity remains shrouded in mystery, stands as one of the most perplexing figures of Quattrocento art. Despite Vasari’s attribution—primarily focused on the New Testament frescoes adorning San Gimignano—scholarly consensus now suggests Bertini was not an individual artist but rather the leader of a collectiv…