The city was one of the main centres of the Yugoslav new wave in the 1980s: VIS Idoli, Ekatarina Velika, Šarlo Akrobata and Električni Orgazam were all from Belgrade. Other notable Belgrade rock acts include Riblja Čorba, Bajaga i Instruktori and Partibrejkers. Today, it is the centre of the Serbian hip hop scene, with acts such as Beogradski Sindikat, Bad Copy, Škabo, Marčelo, and most of the Bassivity Music stable hailing from or living in the city. There are numerous theatres, the most prominent of which are National Theatre, Theatre on Terazije, Yugoslav Drama Theatre, Zvezdara Theatre, and Atelier 212. The Serbian Academy of Sciences and Arts is also based in Belgrade, as well as the National Library of Serbia. Other major libraries include the Belgrade City Library and the Belgrade University Library. Belgrade's two opera houses are: National Theatre and Madlenianum Opera House.