The Czech society is considered, together with the society of the former East Germany, to be one of the most secularized in the world. The aim of the present paper is to sketch in a large outline not only the historical preconditions of this opinion, but also to resume the existing partial results of ethnological research focused on the contemporary changes of religiousness and manifestations of Marian devotion in the Czech Republic after the year 1989. The years 1989 a 1990 brought innumerable forms of religiousness. From the variants of classical Chriastianity through its rather deformed forms up to the spiritual schools of the Far East. At presents there are two Marian movements in Czec Republic: Marian Movements of Priests and Apostolate of Fatima (Blue Army).