A molenaar was a miller. There were different types of mills. Besides the classic Dutch wind-powered mill, there were also horse-drawn mills and water mills. Mills could be used for different purposes, the most common being grind grain or to drain water from low-lying fields. People could not just build a mill, that right was reserved for the landlord. Before the 19th century, most millers did not own the mills that they worked, but worked for the landlord. The French occupation put an end to those manorial rights, giving rise to more owner-operated mills.