A predecessor of current Oberhausen palace was a medieval castle about 200 meters away from today's location. This 12th or 13th century building has now completely disappeared. In 1443 the moated castle controlling an Emscher River passage fell to the von der Hoven clan based in the fiefdom of Kleve. In 1615, Overhus then passed on to become the domain of Conrad von Boenen. The castle was often plundered and seized due to its advantageous position at the important Emscher transition, as took place in the Eighty Years' War for example.
In the late 18th century Oberhausen was left to decay. In 1801 it was leased to Maximilian Friedrich Graf von Westerholt-Gysenberg and daughter-in-law Friederike Karoline von Bretzenheim, the illegitimate daughter of the Bavarian-Palatinate elector Karl Theodor. Because the neglected castle was deemed inappropriate for their social status, Maximilian Friedrich commissioned the architect August Reinking in 1803 to draw up plans for the renovation and extension of an approximately 200-metre-long inn and posting station to the north-west of the castle to become a neoclassical manor house. Schloss Oberhausen was constructed and fitted out according to these plans as a noble place of residency between approximately 1804 and 1820/1821. From 1808 the landscape architect and Dusseldorf court gardener Maximilian Friedrich Weyhe designed the manor house park and gardens.
In 1983 the collecting couple Peter and Irene Ludwig established the Ludwig Institut für Kunst der DDR (Ludwig Institute for Art of the German Democratic Republic) in Oberhausen with a permanent loan of 500 works dedicated to East German art, and brought with them works from Bernhard Heisig, Wolfgang Mattheuer, Willi Sitte and Werner Tübke. In 1996 Peter and Irene Ludwig initiated a new concept for the location in the form of the Ludwig Galerie Schloss Oberhausen.References:
The eight towns in south-eastern Sicily, including Ragusa, were all rebuilt after 1693 on or beside towns existing at the time of the earthquake which took place in that year. They represent a considerable collective undertaking, successfully carried out at a high level of architectural and artistic achievement. Keeping within the late Baroque style of the day, they also depict distinctive innovations in town planning and urban building. Together with seven other cities in the Val di Noto, it is part of a UNESCO World Heritage Site.
In 1693 Ragusa was devastated by a huge earthquake, which killed some 5,000 inhabitants. Following this catastrophe the city was largely rebuilt, and many Baroque buildings from this time remain in the city. Most of the population moved to a new settlement in the former district of Patro, calling this new municipality 'Ragusa Superiore' (Upper Ragusa) and the ancient city 'Ragusa Inferiore' (Lower Ragusa). The two cities remained separated until 1926, when they were fused together to become a provincial capital in 1927.