The Österbybruk was established by the King Gustav Vasa in the 16th century. Int 1643 it was acquired by Louis de Geer and in his time Österbybruk became the center of weapon manufacturing in Sweden. Later it was owned by Grill and Tamm families.
The manor house of Österbybruk was built in 1763-1780 by the design of Elias Kessler and Erik Palmstedt. There is also a Calvinist church with a mirror hall built in 1735. The industrial milieu with labour cottages, workshops and magazines surrounding the manor is well-preserved.References:
Built around AD 90 to entertain the legionaries stationed at the fort of Caerleon (Isca), the impressive amphitheatre was the Roman equivalent of today’s multiplex cinema. Wooden benches provided seating for up to 6,000 spectators, who would gather to watch bloodthirsty displays featuring gladiatorial combat and exotic wild animals.
Long after the Romans left, the amphitheatre took on a new life in Arthurian legend. Geoffrey of Monmouth, the somewhat imaginative 12th-century scholar, wrote in his History of the Kings of Britain that Arthur was crowned in Caerleon and that the ruined amphitheatre was actually the remains of King Arthur’s Round Table.
Today it is the most complete Roman amphitheatre in Britain.