A little piece of Taylor Swift history is going into a museum in Germany. The western city of Gelsenkirchen temporarily changed its name to “Swiftkirchen” in honour of the reigning queen of pop, who staged three performances there last week. As part of the stunt, Gelsenkirchen had put up 30 yellow city sign names with “Swiftkirchen” written on them as a way to welcome the 200,000 fans who descended on the city. Now one of those signs, which also features a pink portrait of the megastar, is going into the collection of a museum dedicated to German contemporary history in the city of Bonn. The H…