All larger universities in Croatia are composed of independent "faculties" (Croatian "fakultet", meaning college or department). Each independent college or department maintains its own administration, professional staff (also known as a "faculty") and campus. The colleges focus on specific areas of learning: Natural Sciences, Philosophy, Law, Engineering, Economy, Architecture, Medicine, and so on. Although a university's colleges or departments are usually located in the same city as the administration of the university, sometimes they are not. For example, Zagreb University's Faculty of Metallurgy is located in the city of Sisak. The universities of Dubrovnik, Pula and Zadar do not have independent colleges.