Niedermunster Abbey, situated at the foot of Mount Saint Odile was founded around 700 AAD by Saint Odile of Alsace, who was also the first Abbess.
Until the end of the 12th century, the two abbeys formed a single institution, but from the beginning of the 13th century, they began to operate as separate establishments. In 1542 the abbey came under the authority of the Great Chapter of Strasbourg Cathedral.
The Abbey buildings of which the ruins are still visible today were built between 1150 and 1180 AD. The Abbey was seriously damaged during the Peasants' War in 1525 and again by two fires, in 1542 and 1572. The nuns abandoned the abbey in 1545 and it was never reoccupied.
The site was then used, up until the 19th century, as a quarry for other buildings, including the adjacent farm.
For several centuries the abbey was known for its relics, the head and arm of Saint Lazarus of Marseille. When the abbey was burnt down these were transferred to Andlau, eventually disappearing during the French Revolution.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.