Seckau Abbey was endowed in 1140 by Augustinian canons. An already existing community in Sankt Marein bei Knittelfeld was moved to Seckau in 1142. At the request of Archbishop Konrad I of Salzburg, Pope Innocent II instituted the founding of the congregation and the transfer to Seckau on 12 March 1143. The abbey church, a Romanesque basilica, was built from 1143 to 1164.
According to an old custom, the canons founded a double monastery. The women's chorus likely came to the abbey no later than 1150 from Salzburg, mentioned in a deed of the Noble Burchard of Mureck in 1150.
This establishment was dissolved in 1782. In 1883 the monastery was resettled by Benedictines from Beuron Archabbey, who had had to leave Germany because of the Kulturkampf. In 1940 the monks were evicted by the Gestapo and the buildings were confiscated. In 1945 the monks were able to return.
The abbey maintains a secondary school (Gymnasium) and carries out the duties of the pastoral care belonging to a parish.
The abbey church, a Romanesque basilica, was built between 1143 and 1164. For centuries it was the place of burial of the Inner Austrian line of the Habsburgs.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.