The Brundby Post Mill is a significant historical landmark and museum located on the island of Samsø in Denmark. This well-preserved post mill dates back to 1857, representing a classic example of traditional Danish windmill architecture and technology from that period. As a post mill, its entire structure rotates around a central post to orient the sails into the wind, a characteristic feature of this early mill type. The mill remained in active operation until 1944, serving the local agricultural community by grinding grain. Following its decommissioning, it was carefully restored to preserve its historical integrity. Today, it functions as a museum, offering visitors insight into 19th-century milling techniques and rural Danish industrial heritage. The mill is strategically positioned in the island's landscape, reflecting the historical importance of wind power for local commerce and self-sufficiency. Its operational mechanism, including the wooden machinery and sail system, remains intact, providing an authentic representation of historical milling practices. The site contributes to the cultural history of Samsø Municipality and forms part of Denmark's national effort to preserve industrial monuments.