In 1661 Rembrandt (or rather the new business) was contracted to complete work for the newly built city hall, but only after Govert Flinck, the artist previously commissioned, died without beginning to paint. The resulting work, "The Conspiracy of Claudius Civilis", was rejected and returned to the painter; the surviving fragment is only a fraction of the whole work. It was around this time that Rembrandt took on his last apprentice, Aert de Gelder. In 1662 he was still fulfilling major commissions for portraits and other works. When Cosimo III de' Medici, Grand Duke of Tuscany came to Amsterdam in 1667, he visited Rembrandt at his house.