The University of Belgrade is a public research university in Belgrade, Serbia. It is the oldest and largest modern university in Serbia.

The University Library Svetozar Marković (Serbian: Универзитетска библиотека Светозар Марковић) is the main library in the University of Belgrade system, named after Svetozar Marković, a Serbian political activist in the 19th century. It is located on King Alexander Boulevard, close to the Faculty of Law and adjacent to the Faculties of Civil Engineering, Electrical Engineering, and Architecture. Serves the educational and scientific needs of students, academics, and scientists. Library Day is 24 May, a day commemorating Slavic educators St. Cyril and Methodius. At the founding of the library, the collection contained 57,254 publications consisting of monographs and serials. Today, the library contains roughly 1,700,000 publications.