Gutenfels Castle - Gutenfels Castle (German: Burg Gutenfels) also known as Caub Castle is a castle 110m above the town of Kaub in Rhineland-Palatinate Germany.It was built in 1220. It was used with Pfalzgrafenstein Castle in the middle of the Rhein and the fortified town of Kaub on the far side to provide an impenetrable toll zone for the Holy Roman Emperor until Prussia purchased the area (1866) and ended this toll in 1867. The castle is in part of the Rhine Gorge a UNESCO World Heritage Site added in 2002. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Building