St. Marx Abbey was a Benedictine nunnery in Gueberschwihr in Alsace, founded in about 1105. Since 1845 it has been the principal house of the Sisters of St. Joseph of St. Marc, rebuilt in 1852 after a disastrous fire.
Before the foundation of the nunnery there had been a community of monks on the site, which came to an end after a serious fire. Abbot Theoger of St. George's (1088-1119) replaced it with the nunnery, which was made subordinate to St. George's in 1184, according to a deed of Pope Lucius III. In about 1400 a monk of St. George's was mentioned as the prior here, as were possessions of the nunnery in Geberschweier and Osenbach.
In 1710 a beer brewery was built there. In 1754 the priory was transferred from St. George's to Ebersmünster Abbey in Alsace.
In 1845 the premises, empty since the French Revolution, were used by Abbé Pierre Paul Blanck to establish a women's community under the Benedictine Rule combining the veneration of the Holy Sacrament with manual labour and the care of orphans. The buildings burnt down in 1852 and the difficulties facing the new community were so great that it seemed impossible for it to survive. Against all odds it did continue and was constituted as a formal order on 9 October 1868 with the election and appointment of Sister Maria Xavier as superior.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.