Michelangelo Buonarroti comes over, a cup of wine in his hand. He is growing a beard. “I have it!” he says, delightedly. “What?” Girolamo asks, but Marsilio knows. “That huge block of marble that’s been standing about for so long?” “Yes. I am going to carve the prophet Amos, to go high up on the cathedral. I thought I’d do him with the face of Brother Giovanni. What do you think?”
I like the cameo appearance here. No plot significance, just cute background.
