He worked as a research fellow at the Institute for the Protection of Cultural Monuments in Berlin (1971-1998).
He is actively engaged in research, conducts numerous trips in Greece, Yugoslavia, Romania, West Germany, DDR, USSR, Switzerland, Italy and Albania.
He is the author of more than 500 scientific papers in the field of medieval history and fine arts.
[1][2] Chilingirov supports the fringe views on the autochthonous origin of the Bulgarian people, and espouses ideas similar to those of Gancho Tsenov.
[3][4] "Изкуството на Българското средновековие" ("Die Kunst des christlichen Mittelalters in Bulgarien", 1979, C.H.Beck, Мюнхен и Union-Verlag, Берлин, З издания); [5] "България - Културна история " ("Bulgarien, Kulturgeschichte", Prisma-Verlag, Лайпциг, 2 издания: 1986 и 1987);