Which peoples practiced Baltic religion in eastern Europe?

Baltic religion refers to the traditional beliefs and practices of the Balts, an Indo-European people who historically inhabited the southeastern shores of the Baltic Sea and vast areas of eastern Europe, including parts of modern-day Lithuania, Latvia, Belarus, western Russia, and northern Poland.123

The peoples who practiced these religions included several distinct groups:

• Modern Baltic peoples: The ancestors of the Lithuanians and Latvians.2
• Extinct Baltic groups:
  • Prussians: Inhabited the western regions until they were Germanized in the 18th century.2
  • Yotvingians (Jatvians): Assimilated among Lithuanians and Slavs by the 16th–17th century.2
  • Curonians: Considered by some a transitional group between East and West Baltic, they were Latvianized by the 16th century.24
  • Semigallians and Selonians: Extinct by the 14th century.2
  • Galindians: A tribe mentioned in historical chronicles as late as the 12th century.4

While the ancestors of Latvians and Lithuanians maintained their pagan traditions until the Middle Ages, many eastern Baltic tribes were assimilated or displaced by Slavic expansion between the 7th and 13th centuries.24