Teutonic Knights conquered the Ełk area in 1283. They built first a wooden castle to the site of former Old Prussian settlement and the town grew around it. It was first documented in 1398. The brick castle was built in 1497. In 1888 the castle was rebuilt - it became a prison and had that function until 1976. In 1958 during renovation of part of ther castle, under its walls, there was a collapsed tunnel found. After 1985 the castle doesn't have nor any function neither conservation care.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.