This paper follows the cult towards some of the St. Holy Seven Saints - St. Cyril, St. Methodius, St. Klement and St. Naum. The accent falls on countries like Bulgaria, Russia, Romania, Ukraine, Moldova, Turkeу and others. Scientific, as well as festivе manifestations are being reviewed during the anniversary years 1963, 1966 and 1969, and different scientific meetings, conferences and simposiums, which show the cult in new light. On one hand the article takes into account the scientific achievements from the middle of the 19th century until 1945, and on the other - after the Second World War. Known facts and hypotheses are being ideologized or moved aside, so that the new political landmarks can be emphasized. During these scientific forums Bulgaria was considered as a bridge between the East and the West.