Christina sent him on tour to the European courts, apparently also for political purposes. While sick in Germany he was thought dead and prepared for burial, but he revived and was gradually restored to life. He joined Christina's court again in Rome in 1655, followed her to France in 1656. He asked leave from her company to visit his friends and family in the Netherlands, which according to Houbraken was against her wishes. His death at The Hague that same year was suspected of being due to poisoning.
