 The Munttoren received new extra foundations to prevent it from sagging during construction of the Noord/Zuidlijn, the new metro line.The city has allocated 1.9 million euros for this purpose, according to a May 17, 2006 report in the newspaper" Het Parool".The carillon was made in 1668 by Pieter Hemony, who added new bells to the instrument that he and his brother François had made earlier for the tower of the Amsterdam stock exchange in 1651.