Treasury
A treasury is either:
1) A government department related to finance and taxation, a finance ministry.
2) A place or location where treasure, such as currency or precious items, is kept. These can be state or royal property, church treasure, or in private ownership.
The head of a treasury is typically known as a treasurer. This position may have little control over the actions of the treasury, mainly if they are not an elected representative.
The adjective for a treasury is typically treasurial. The adjective "tresorial" can also be used, but this typically means about a treasurer.
In past times revenue collected by the monarch would be kept in a secure stronghold; the kings of England traditionally used the Tower of London, which also housed the Royal Mint. Latterly gold reserves are held in a country's central bank; the gold reserves of the United Kingdom are housed in a vault at the Bank of England.
The country with the largest gold reserve is the United States; the US claims to have 8133.5 tons of gold, held at Fort Knox (58%), West Point (20%), the US Mint in Denver (16%), and the residue (approximately 5%) at the Federal Reserve Bank of New York.
The second largest reserve in Germany is held at the Deutsche Bundesbank in Frankfurt am Main, the Federal Reserve Bank in New York, and the Bank of England in London. The third, held by the IMF, is in some designated deposits.
These treasuries are believed to satisfy some essential criteria, which include cost efficiency, security, and the ability to liquidate reserves at short notice.
UK gold reserves. Bullion by post. Retrieved from: https://www.bullionbypost.co.uk/index/gold/uk-gold-reserves/
US Gold Reserves, Of Immense Interest to Russia and China. Bullionstar. Retrieved from: https://www.bullionstar.com/blogs/ronan-manly/us-gold-reserves-immense-interest-russia-china/