Private swap number 4, from Meg, my Polish postcrosser friend. ^_^ This is a castle of the Teutonic Order in Malbork, is the largest castle in the world by surface area and largest brick building in Europe. Is a classic example of a medieval fortress and it’s completion was in 1406. UNESCO designated the castle and it’s museum as World Heritage Site.
Talking about castles, sometimes it feels like I’m the only Castle (tv show) fan who loves both, the show and the buildings. :P That’s why I tag that one as castle.