On 13 August 1640 he was accepted into the Amsterdam masons' guild as a master, and on 3 December 1647 the city government appointed him master mason of the city ("stadsmeestersteenhouwer").
He was accepted into the Amsterdam masons' guild as a master. This was on 13 August 1640. The city government appointed him master mason of the city ("stadsmeestersteenhouwer"). This was on 3 December 1647.