 He had a remarkable impact on the furrier Melchior Hoffman, who spread Anabaptist ideas to northern Germany and what is now the Netherlands.In Amsterdam, the founders of the English Baptists, John Smyth and Thomas Helwys, accepted central teachings from the Waterlander Mennonites.Some Seventh-day Adventist scholars, such as J. N. Andrews, have provided historical evidence that Karlstadt also defended observance of the seventh-day sabbath.