Zelen-grad (Serbian: - English: Green-town) is a fortress and former town in Serbia. It is located 15 km south from Leskovac near the village of Vucje. It belonged to the Vojvoda Nikola Skobaljic and it is also known as Skobaljic Grad. Today only remains of the town can be seen. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Building