Arkikatedra Bazilika
Vilnius's main cathedral, Arkikatedra Bazilika, has been a national symbol for centuries; inside is the dazzling 17th-century Chapel of St. Kazimieras. Originally a temple to Perkūnas, one of Lithuania's many pagan gods, the building became a church in the 13th century, when Lithuania converted from paganism to Christianity (the last European country to do so). The cathedral was used for other purposes under Communism; the church reclaimed the cathedral in the 1980s.