Upnor Castle, Kent England

It was Henry VIII that first recognised the importance of the Medway with
number of war ships were being anchored here. In 1547 a storehouse was
rented at Gillingham, the start of the Dockyard as we know it today.
In 1564 there are said to have been some 23 of Queen Elizabeth's ships anchored
in the area. Upnor was commissioned to protect this fleet and the Royal
Dockyard. Completed in 1568 and in 1585 included a chain to cross the
Medway. However, by 1669, the castle was to be employed for stores and
magazine.
The castle saw action on at least two occasions. In 1648, during the
civil war, Kent Royalists captured the castle. However, the squatters
were soon ejected from the castle. The second came during the Dutch
War of 1665 - 1667. On June 12th 1667, the Dutch fleet sailed up the
Medway. Whilst Upnor gallantly bombarded the Dutch, they managed to
cross the chain and attacked a number of war ships. Whilst some were
burnt, the Flagship Royal Charles was captured. Fortunately, the Dutch
withdrew, sparing the Dockyard. The
castle continued as a store, magazine and barracks until 1827, when it was
designated as an Ordinance Laboratory. However, towards the end of the
19th century, it was to return to stores again. After the Second World
War, the castle was to become a museum, becoming a national monument in 1961.