The Office of Armoury split away from the Privy Wardrobe of the Tower (of London) in the early 15th century. The Master of the Ordnance came into being in 1415 with the appointment of Nicholas Merbury by Henry V. The Office of Ordnance was created by Henry VIII in 1544 and became the Board of Ordnance in 1597. Its head was the Master-General of the Ordnance; his subordinates included the Lieutenant-General of the Ordnance and the Surveyor-General of the Ordnance. Before the establishment of a standing army or navy, the Ordnance Office was the only permanent military department in England. In 1764 it established the British standard ordnance weights and measurements for the artillery, one of the earliest standards in the world.