Sofia University “St. Kliment Ohridski” University of Architecture, Civil Engineering and Geodesy National Sports Academy “Vasil Levski” National Institute of Geophysics, Geodesy and Geography (BAS) Institute of Ethnology and Folklore Studies with Ethnographic Museum (BAS) Institute of Art Studies (BAS) Institute for Literature (BAS) Institute of Balkan Studies and Centre of Tracology “Prof. Alexander Fol” (BAS) Cyril and Methodius Research Centre (BAS) National Library “St. St. Cyril and Methodius” Regional Museum of History in Sofia