The Oslo City Museum at Frogner Manor in Vigeland Park is a museum of cultural history with one of Norway's largest painting collections. The history of Oslo is illustrated by thematic exhibitions that show the development of Oslo and the city's cultural and commercial activities through 1000 years. Frogner Hovedgård (the main building) and its authentic interior from 1750-1900 is open in July and August.
References:Kakesbeck is one of the largest medieval fortifications in Münsterland and the oldest castle in Lüdinghausen. The imposingly grown complex originated in 1120 as a motte, a small hilltop tower castle. After numerous changes of ownership, the castle was extended onto two islands, but it was not until the 14th century that it underwent significant alterations and extensions under the von Oer family. The estate experienced its heyday in the middle of the 18th century, when it covered an area of almost one square kilometre and consisted of five further outer castles in addition to the core castle, which were secured by ramparts and moats.
The well-maintained condition of the castle today is thanks to the late Wilfried Grewing, the former lord of the castle. The foundation named after him has been particularly committed to preserving the property since 2020.