Germany: Oberhausen Castle

Last Wednesday I got a postcard from Germany.

It shows Oberhausen Castle. Although dating back to the 12th/13th century, the modern appearance of Oberhausen Castle is just from the early 19th century. Interestingly the castle is not named after the city of Oberhausen, but the castle gave its name to a train station which gave its name to the newly founded city in the late 19th century. After damages in World War II it was rebuilt in the 1950s and now houses the Ludwiggalerie Schloss Oberhausen, an art museum. 

A Winter Aconite (issued 08-06-2017) and a Zinnia (issued 02-04-2020) were used as postage and got cancelled in a strange way. The cancellation says "nachträglich entwertet" (cancelled afterwards). Most likely the card got not cancelled by the sorting machine and instead of a pen cancel I got this one. Such a pity that it is so blurred, as I have never seen something like that before.

Thank You very much Marcel!