Ossolineum Library is an important national research center and historic archive. The Ossolineum's impressive collections include an original copy of Adam Mickiewicz's epic 'Pan Tadeusz'. The library offers rooms for rent in two buildings. The Aula, three Halls Under the Dome, the Refectory and the Lobby are halls available in the main building of library on 37 Szewska Street. A conference room is available in the building on 17 Nankiera Street. Two courtyards are also available: the Inner Courtyard is accessible only during the library's opening hours; the Outer Courtyard is open to the general public.