Amersfoort (äˈmərsfōrt) [key], city (1994 pop. 110,117), Utrecht prov., central Netherlands. It is a transportation and manufacturing center. Points of interest include a 14th-century water gate, the 15th-century Gate of Our Lady, and the old town, which has medieval houses. Johan van Oldenbarneveldt, the Dutch statesman, was born there in 1547.