The Château du Rivau: Martin Luther's Secret Stronghold in Lémeré, France

The Château du Rivau, a historic monument nestled in the village of Lémeré, France, played a significant role during the Reformation. Built in the 13th century, the castle saw various ownership changes among lords and nobles until it became a hotbed for the Reformation. Martin Luther, the founder of Protestantism, secretly propounded his revolutionary ideologies from the castle in 1429, setting off a chain reaction that would alter the religious landscape of Europe.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons