Vaults (1 janv. 1700 – 1 janv. 1850)

Description:

Before steel and modern metallurgy techniques popularized vaults, reinforced rooms were used for the highest level of security. As steel became a more popular element for manufacturing, vaults started to appear in banks, large businesses, casinos, schools and military buildings to store intellectual property, money, or even dangerous objects. Modern vaults feature walls more than a foot thick, encased with strengthened concrete. Well-constructed vaults include some of the most complicated locking mechanisms known to man.