Jean Fouquet's diptych from the collegiate church of Melun is one of the most important paintings of 15th century French art. The left wing with the donor portrait has been in Berlin since 1896, while the right wing belongs to Antwerp. Both halves were separated in 1773 and the Berlin exhibition unites them once again. In the accompanying catalog, international researchers highlight different aspects of the work, including Fouquet's iconography and technique.