In religion, Albertus van Raalte was a Reformed Church of America pastor who led the Dutch immigrants who founded the city of Holland, Michigan in 1846. Louis Berkhof, a Reformed systematic theologian, is greatly studied today in seminaries and Bible colleges. Herman Hoeksema, a theologian, was instrumental in the series of events that precipitated the creation of the Protestant Reformed Church. Prominent Christian author Lewis B. Smedes wrote "", an influential work discussing a religious view on sexuality and forgiveness. Menno Simons (1496 – 31 January 1561) was a former Catholic priest from the Friesland region of the Netherlands who became an influential Anabaptist religious leader. Simons was a contemporary of the Protestant Reformers and it is from his name that his followers became known as Mennonites.