Inveraray Castle has been the hereditary seat of the Clan Campbell chiefs since the 15th century.  It was burnt by the Marquis of Montrose in 1644.  The 3rd Duke rebuilt the castle between 1746 and 1780.  The famous architect William Adam and his sons designed the present structure for the 3rd Duke.  Dr. Johnson was entertained here in 1773.  The castle houses many historic relics, including a cannon from the "Florida", a Spanish Armada vessel.