However, while Birka was abandoned in the mid-10th century, the royal estate was apparently not as the runestone U 11 from around 1070 which claims to have been carved for the king was erected next to the royal mounds.
Although Birka was deserted around the middle of the 10th century, the royal estate seemingly survived as indicated by a runestone U 11 dating back to approximately 1070, which is believed to have been carved for the king and positioned near the royal mounds.