Zamek w Mielniku, Medieval castle ruins in Mielnik, Poland
Zamek w Mielniku is a medieval castle ruin on a hilltop with visible stone remains of the high castle, lower castle, and outer fortifications. The site shows the layered structure of a fortress built for strategic defense.
The fortress was founded in medieval times and gained prominence in 1501 when it hosted the signing of the Union of Mielnik between the Kingdom of Poland and the Grand Duchy of Lithuania. This event made it a significant political location in the region.
The castle chapel, built before 1420, was originally dedicated to Corpus Christi, Assumption of Mary, and Saint Nicholas, showing how religious life was woven into the fortress itself.
The site is accessible via marked trails that lead up the hillside and provide views over the Bug River valley during the climb. Sturdy footwear is recommended as the paths are uneven and sometimes steep.
During Russian occupation, authorities buried the upper castle area under about 6 meters (20 feet) of soil to build a small propaganda chapel on top. This unusual repurposing of the ruins shows how external political forces shaped the site's history.
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