At nr 172 on the right side of the canal stands one of the most beautiful merchant's houses in Amsterdam. It was designed by municipal architect Hendrick de Keyser and built in 1617 for merchant Willem van den Heuvel, with money he inherited from his uncle Giovanni Bartolotti. After building the house, van den Heuvel had his name changed to Guillermo Bartolotti. He made his fortune as a silk merchant and banker. In his time he was one of the richest men in Amsterdam.