A castle in Arbon is first mentioned in 720 in a history of St. Gall Abbey. It stood on or near the site of the Roman era Arbor Felix fortress from 250 AD. After the Romans retreated south of the Alps around 400, the old fortress was abandoned. Sometime later a Frankish castle was built in Arbon probably for the Frankish royal family. By around 700, Arbon and presumably the castle, were the property of the diocese of Constance and an ecclesiastic overseer or bailiff ruled over Arbon.
The oldest part of the current castle is a 13th-century, originally free standing, residential tower. The tower may have been built on the foundation of an earlier building. The lower walls are up to 3.2 meters thick. Inside the castle there are two Romanesque fireplaces. In 1515-20 the Bishop Hugo von Hohenlandenberg rebuilt the castle to its current appearance. The old tower was rebuilt into a U shape. The upper most story, the gables and the hip roof are also from this reconstruction. The outer wall of the castle moved to stand exactly over the north-west corner of the Roman era fortress.
In 1822 the Stoffel silk ribbon weaving company moved into the castle. They remained there until 1907. In 1911 the castle was bought by Adolph Saurer, the founder of Adolph Saurer AG. He built workshops around the castle building as he experimented with motors, trucks and machinery. In 1944 his son, Hippolyt Saurer sold the castle to the city. The city renovated and expanded the castle and in 1967 opened the Historisches Museum Arbon (Arbon History Museum).References:
Heraclea Lyncestis was an ancient Greek city in Macedon, ruled later by the Romans. It was founded by Philip II of Macedon in the middle of the 4th century BC. The city was named in honor of the mythological hero Heracles. The name Lynkestis originates from the name of the ancient kingdom, conquered by Philip, where the city was built.
Heraclea was a strategically important town during the Hellenistic period, as it was at the edge of Macedon"s border with Epirus to the west and Paeonia to the north, until the middle of the 2nd century BC, when the Romans conquered Macedon and destroyed its political power. The main Roman road in the area, Via Egnatia went through Heraclea, and Heraclea was an important stop. The prosperity of the city was maintained mainly due to this road.
The Roman emperor Hadrian built a theatre in the center of the town, on a hill, when many buildings in the Roman province of Macedonia were being restored. It began being used during the reign of Antoninus Pius. Inside the theatre there were three animal cages and in the western part a tunnel. The theatre went out of use during the late 4th century AD, when gladiator fights in the Roman Empire were banned, due to the spread of Christianity, the formulation of the Eastern Roman Empire, and the abandonment of, what was then perceived as, pagan rituals and entertainment.
In the early Byzantine period (4th to 6th centuries AD) Heraclea was an important episcopal centre. A small and a great basilica, the bishop"s residence, and a funerary basilica and the necropolis are some of the remains of this period. Three naves in the Great Basilica are covered with mosaics of very rich floral and figurative iconography; these well preserved mosaics are often regarded as fine examples of the early Christian art period.
The city was sacked by Ostrogoth/Visigoth forces, commanded by Theodoric the Great in 472 AD and again in 479 AD. It was restored in the late 5th and early 6th century. When an earthquake struck in 518 AD, the inhabitants of Heraclea gradually abandoned the city. Subsequently, at the eve of the 7th century, the Dragovites, a Slavic tribe pushed down from the north by the Avars, settled in the area. The last coin issue dates from ca. 585, which suggests that the city was finally captured by the Slavs. As result, in place of the deserted city theatre several huts were built.
The Episcopacy Residence was excavated between 1970 and 1975. The western part was discovered first and the southern side is near the town wall. The luxury rooms are located in the eastern part. The 2nd, 3rd and 4th rooms all have mosaic floors. Between the 3rd and 4th rooms there is a hole that led to the eastern entrance of the residence. The hole was purposefully created between the 4th and 6th century.