Skänninge Abbey, Monastery ruins in Mjölby Municipality, Sweden

Skänninge Abbey is the excavated stone foundations of a Dominican convent for nuns in Skänninge, Mjölby Municipality, Östergötland. The remains lie by the Church of Saint Martin, northwest of the Skenaån stream, and include a partly reconstructed well in the convent courtyard. The walls were uncovered in the 1920s, 1930s and 1940s.

Ingrid Elofsdotter founded the convent in 1272 after pilgrimages to Rome and her husband's death; it was consecrated on 12 August 1281 and received a charter from Magnus Ladulås in 1282. After Ingrid died in 1282, her cult drew pilgrims and gifts. In 1505 the Kalmar sisters moved in with their estates, and in 1507 Ingrid's relics were translated. The nuns refused to move to Vadstena in 1531 and were transferred to Vreta in 1544.

The convent became the centre of the cult of Ingrid of Skänninge after her death in 1282, drawing pilgrims to Skänninge. Noble families sought burial in its graveyard and gave large gifts in connection with funerals. In 1507 her relics were translated in a ceremony described as one of the Dominican order's last great feasts in Sweden before the Reformation.

Information panels on the site explain the former layout of the buildings and the daily life of the nuns. The ruins are located in open ground and are easy to reach, but it helps to allow time to explore the different areas.

Ingrid of Skänninge was never canonised, yet in 1507 the pope permitted her relics to be translated, and the shrine ceremony was held here with great solemnity. It is counted among the Dominican order's last major feasts in Sweden before the Reformation.