Ardgowan Castle is located in the grounds of Ardgowan House near Inverkip. In 1306, Inverkip was besieged by supporters of Robert Bruce, led by Robert Boyd of Cunningham. In 1403, King Robert III granted the lands of Ardgowan to his natural son, Sir John Stewart. The castle is dated to the late 15th century.
In 1667 Archibald Stewart was created a baronet. The 3rd baronet married, in 1730, Helen Houston, heiress of the Shaws of Greenock. Their son Sir John Shaw-Stewart, 4th Baronet, commissioned a design for a new house from the architect Hugh Cairncross. Construction began in 1797, and was completed around 1801, after which the old castle was abandoned. The ruin was consolidated and repaired in 1936.
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.