They also constructed large cult centres surrounded by pales, earthworks and moats. The largest one is found at Sarup on Fyn. It comprises 85,000 m2 and is estimated to have taken 8000 workdays. Another cult centre at Stävie near Lund comprises 30,000 m2. In the context of the Kurgan hypothesis (or steppe hypothesis), the culture is seen as non-Indo-European, representing a culture of Neolithic origin, as opposed to the Indo-European-language-speaking peoples (see Yamna culture) who later intruded from the east. Marija Gimbutas postulated that the political relationship between the aboriginal and intrusive cultures resulted in quick and smooth cultural morphosis into the Corded Ware culture. By contrast, a number of other archaeologists in the past have proposed that the Corded Ware culture was a purely local development of the Funnelbeaker culture, which has been debunked by genetics. The Bronocice pot, discovered in a village in Gmina Działoszyce, Świętokrzyskie Voivodeship, near Nidzica River, Poland, is a ceramic vase incised with the earliest known image of a wheeled vehicle. It was dated by the radiocarbon method to 3635–3370 BC, and is attributed to the Funnelbeaker culture. Today it is housed in the Archaeological Museum of Cracow ("Muzeum Archeologiczne w Krakowie"), Poland. The picture on the pot symbolically depicts key elements of the prehistoric human environment. The most important component of the decoration are five rudimentary representations of what seems to be a wagon. They represent a vehicle with a shaft for a draught animal, and four wheels. The lines connecting them probably represent axles. The circle in the middle possibly symbolizes a container for harvest. Other images on the pot include a tree, a river and what may be fields intersected by roads/ditches or the layout of a village. The Bronocice Pot suggests the existence of wagons in Central Europe as early as in the 4th millennium BC. They were presumably drawn by aurochs whose remains were found with the pot. Their horns were worn out as if tied with a rope, possibly a result of using a kind of yoke. Based on Bronocice discovery, several researchers (Asko Parpola and Christian Carpelan),[6] pointed out that "Indo-European languages possess inherited vocabulary related to wheeled transport", thus providing new research information about the origin of the Indo-European; "the wheeled vehicles were first invented around the middle of the fourth millennium BC."