Tilbury Fort

The artillery fort at Tilbury on the Thames estuary protected London's seaward approach from the 16th century through to World War II. Henry VIII built the first fort here, and Queen Elizabeth famously rallied her army nearby to face the threat of the Armada.  Tilbury Fort is on the north, Essex, bank of the River Thames in England and was built to defend London from attack from the sea, particularly during the Spanish Armada and the Anglo-Dutch Wars. The site is now cared for by English Heritage and opened to the public.