For centuries St. Nicholas was famous throughout the Netherlands as a protector of children who gave them gifts each year on 5 December, but also as the patron saint of sailors and merchants. The Nicolaikerk was built around 1100 and completely dedicated to this popular Spanish saint. In the 15th century the church was rebuilt and its Romanesque style was replaced with Gothic elements. One of its big attractions is the choir vaulting, which contains a 14th-century mural. As the church is plastered white, it feels quite spacious inside.