The Board of Ordnance was a British government body. Established in the Tudor period, it had its headquarters in the Tower of London. Its primary responsibilities were 'to act as custodian of the lands, depots and forts required for the defence of the realm and its overseas possessions, and as the supplier of munitions and equipment to both the Army and the Navy'. The Board also maintained and directed the Artillery and Engineer corps, which it founded in the 18th century. By the 19th century, the Board of Ordnance was second in size only to HM Treasury among government departments. The Board lasted until 1855, at which point it was disbanded.

The Royal Armouries is the United Kingdom's national collection of arms and armour. Once an important part of England's military organization, it became the United Kingdom's oldest museum, and one of the oldest museums in the world. It is also one of the largest collections of arms and armour in the world, comprising the UK's National Collection of Arms and Armour, National Artillery Collection, and National Firearms Collection. Originally housed in the Tower of London from the 15th century, today the collection is split across three sites: the Tower, the Royal Armouries Museum in Leeds, and Fort Nelson near Portsmouth