Homburg was first mentioned in documents in 1276. Gottfried I of Sayn from the House of Sponheim (1247-1283/84) transferred his castrum Homburg to the German King Rudolf of Habsburg, in order to place it under his protection. He received the castle back as an inheritance. The castle was the residence of the Counts of Homburg, an imperial fiefdom (Reichsherrschaft).
From 1635 Count Ernst von Sayn-Wittgenstein altered the castle to its present-day appearance. One hundred years later the line of Sayn-Wittgenstein-Berleburg took over its management; the structure then fell into disrepair. Not until 1904 was its decline halted and, in 1926, a museum, founded by Hermann Conrad, took over the premises. Today it is the Museum of Oberbergisches Kreis.
In 1999 during an excavation, a stone keep of about 12.5 metres diameter was uncovered. Experts estimate that it dates to the 11th century. A consequence of this was that the history of the castle had to be reassessed to that time.
At the beginning of 2005 the district council decided to upgrade the castle. Their plans included inter alia the expansion of the 'Red House' (Rotes Haus) and the construction of a central cash desk and toilet area. The old orangery was to be torn down and replaced by a new two-storey administration and exhibition building.
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.