Beautifully framed print of 'The Round Tower, Old Portsmouth' by Albert C. Jupp, showing the sea fort, first built in the early 15th century on the orders of Henry VIII, later rebuilt in stone in the 1490s, and adapted during the Napoleonic Wars. Portsmouth, home of the British Royal Navy, was, by the 19th century, one of the most fortified cities in the world. The Round Tower is now a Grade I listed building.