SU meaning in Academic & Science ?

Sofia University, "St. Kliment Ohridski" at the University of Sofia, (Bulgarian: Софийски университет „Св. Климент Охридски“, Sofijski universitet „Sv. Kliment Ohridski“) is the oldest higher education institution in Bulgaria.

Founded on 1 October 1888, the edifice of the university was constructed between 1924 and 1934 with the financial support of the brothers Evlogi Georgiev and Hristo Georgiev (whose sculptures are now featured on its façade) and has an area of 18,624 m² and a total of 324 premises. The university has 16 faculties and three departments, where over 21,000 students receive their education. The current rector is Anastas Gerdzhikov.

It has been consistently ranked as the top university in Bulgaria according to national and international rankings, being constantly among the best four percent of world universities according to QS World University Rankings.