For much of 1517 Michelangelo Buonarroti was busy quarrying marble in the mountains near Carrara. From time to time, however, he received letters relating how his affairs were going in Rome. These contained updates on — among other matters — how his friend and collaborator Sebastiano del Piombo was getting on with a big altarpiece which he hoped, with Michelangelo’s help, would vanquish their joint rival, Raphael.