principality of Opole Directory References Discover 7 of the World’s Most Dangerous Festivals Causes of the Great Depression 9 Mind-Altering Plants 6 Wars of Independence 12 Novels Considered the “Greatest Book Ever Written” How Deadly Is Quicksand? 9 of the World’s Deadliest Snakes Contents principality of Opole historical state, Poland Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:capital at Opole In Opole…became the capital of the Opole principality, which included the entire Upper Silesia region. The town passed to Bohemia (1327), the Habsburgs (16th century), and Prussia (1742) and was returned to Poland in 1945. Read More