[2] Lutheranism is the main Christian denomination among ethnic Latvians due to strong historical links with the Nordic countries and Northern Germany (see Hanseatic League), while Catholicism is most prevalent in eastern Latvia (Latgale), mostly due to Polish influence.
In the 12th to 13th centuries Latvia first became part of the Catholic Church, as the Christian kings of Denmark, Sweden and the North German Livonian and Teutonic military orders fought for influence in the region in what later became known as the Northern Crusades.
Along with the rest of the traditional holidays, Christmas (Ziemassvētki) and Easter (Lieldienas) in Latvia still largely retain their pagan roots.
During the Protestant Reformation the teachings of Lutheranism from Northern Germany and Scandinavia completely changed the religious landscape in the country, and eventually only Latgale remained Catholic due to the influence of the Polish–Lithuanian Commonwealth.
[3][4][5] Because of the state policy of atheism during the Soviet era and the general European trend of secularization, religiosity declined drastically, and today a growing percentage of Latvians claims not to follow any religion, with low church attendance.
[8] The Latvian polling agency SKDS has also gathered information regarding the religious affiliation of Latvia over the years.
[10] This total included: Lutheran (294), Catholic (250), Orthodox (122), Baptist (94), Old Believer Orthodox (69), Pentecostal (52), Seventh-day Adventist (51), Evangelical (39), New Generation (18), Muslim (17), Jehovah's Witnesses (15), Jewish (13), Methodist (12), New Apostolic (11), Hare Krishna (11), Dievturi (10), Buddhist (4), Church of Jesus Christ of Latter-day Saints (Mormons) (4), and 18 other congregations.