Arles-sur-Tech is best known for its abbey, which allegedly holds the relics of Saints Abdon and Sennen in a sarcophagus called Sainte Tombe, traditionally believed to have been brought from Rome 10th century. Its waters are traditionally believed to hold miraculous healing properties.
The Benedictine abbey of Sainte-Marie was founded in 778 and is the oldest Carolingian abbey in Catalonia. The main square contains the houses which were the first to be built around the abbey. The Abbey Sainte-Marie has a beautiful gothic cloister built in the 13th century and a large and impressive 18th century organ. Its most curious item though is a 4th century sarcophagus which once contained the relics of Saints Abdon and Sennen.References:
Ängsö Castle was first named as "Engsev" in a royal charter by king Canute I of Sweden (r. 1167-1196), in which he stated that he had inherited the property after his father Eric IX of Sweden. Until 1272, it was owned by the Riseberga Abbey, and then taken over by Gregers Birgersson.
From 1475 until 1710, it was owned by the Sparre family. The current castle was built as a fortress by riksråd Bengt Fadersson Sparre in the 1480s. In 1522, Ängsö Castle was taken after a siege by king Gustav Vasa, since its owner, Fadersson's son Knut Bengtsson, sided with Christian II of Denmark. However, in 1538 it was given by the king to Bengtsson's daughter Hillevi Knutsdotter, who was married to Arvid Trolle.
In 1710, the castle was taken over by Carl Piper and Christina Piper. Ängsö Castle was owned by the Piper family from 1710 until 1971, and is now owned by the Westmanna foundation. The castle building itself was made into a museum in 1959 and was made a listed building in 1965. It is currently opened to visitors during the summers.
The castle is a cubical building in four stores made by stone and bricks. The lower parts is preserved from the middle ages. It was redecorated and expanded in the 1630s. The 4th storey as well as the roof is from the expansion of Carl Hårleman from 1740-41. It gained its current appearance in the 1740s.