The Rembrandt letters, one of the letters Albrecht Dürer wrote to his friend Willibald Pirckheimer during his stay in Venice in 1506, a letter from the eighty-seven-year-old Michelangelo to Cosimo I de’ Medici and a letter from Titian to Emperor Charles V, together with illustrated letters by Édouard Manet and Paul Gauguin, are just some of the highlights.