We take them for granted: bicycles, cars and other vehicles that move effortlessly thanks to the wheel, a revolutionary invention dating back thousands of years. This wheel is the oldest in the Netherlands: it dates from around 2750 BC. Together with a second wheel it was found in a small peat bog near Ubbena. This wheel has a diameter of seventy centimetres and was made from one solid piece of oak. It was part of a two-wheel cart pulled by oxen and probably loaded with merchandise. Its owner left the wheels in the bog, as a sacrifice to supernatural powers.