Ulvåsa in Ekebyborna is a manor near Motala with two known major Medieval elite settlement sites. Excavations in 2002 proved that the unfortified Gamlegården site was established before AD 1100. The fortified Birgittas udde site has seen no archaeological fieldwork since 1924, when the main building's cellar was emptied and restored. Its date is only known to the extent that almost all moated sites of this kind in Sweden belong to the period 1250-1500.