In 1671 he organised the auction of Gerrit Reynst 's collection .
In 1671 he offered thirteen paintings and some sculptures from among those which had not sold at the auction to Frederick William , Elector of Brandenburg .
In 1671 he organised the auction of Gerrit Reynst 's collection and offered thirteen paintings and some sculptures from among those which had not sold at the auction to Frederick William , Elector of Brandenburg .