In 1465 Verrocchio made a wash basin for the room of San Lorenzo's where the robes and Communion vessels were kept. (It is now called the "Old Sacristy".) Above the basin is carved an eagle, the symbol of St John the Evangelist. On the bowl of the basin is carved the Medici coat of arms. Verrocchio then had to design a tomb for Cosimo, the famous banker, and grandfather of the Medici family. 