The University of Belgrade (Serbian: Универзитет у Београду / Univerzitet u Beogradu) is the oldest and largest university of Serbia. Founded in 1808 as the Belgrade Higher School in revolutionary Serbia, by 1838 it merged with the Kragujevac-based departments into a single university. The University has nearly 90,000 students (including around 1,700 postgraduates) and over 4,200 members of teaching staff. The University comprises 31 faculties, 8 research institutes, a system of university libraries and information centres, and the Belgrade University Library (Carnegie library). The faculties are clustered into five groups based on their academic characteristics. Since its founding, the University has educated more than 330,000 bachelors, around 21,300 magisters, 29,000 specialists and 12,600 doctors. The University of Belgrade was established in 1808 as the Belgrade Higher School (Serbian: Велика школа) by Dositej Obradović, Serbian key figure in the Age of Enlightenment. It was the highest ranking educational institution in Serbia between 1808 and 1905, as the first Higher School (1808-1813), The Belgrade Lyceum (1838-1863), and the second Higher School (1863-1905).