That the residents of the Italian town of Marcialla have long believed that a fresco in their local church was painted by a young Michelangelo would come as no surprise to many scholars in the art world. That the villagers may be right, however, is a shock of the highest order. “At the end of last year, a stone slab forming part of the altar was heaved aside to reveal the first visible evidence for the claim: a monogram with the letters M, B and F intertwined.”