Windsor is renowned for its royal links, and the castle is the oldest and largest occupied castle in the world, looming high above the Thames since Norman times. In the castle grounds, Tim Wonnacott visits the Royal Windsor Horse Show in search of antiques and collectibles that bring the history of Windsor to life, including cufflinks presented by a grateful king and a very unusual oar. Tim also learns about the origins of Windsor chairs and the history of boating on the River Thames.