An Arch-Treasurer (German: Erzschatzmeister, Latin: Archithesaurarius) is a chief treasurer, specifically the great treasurer of the Holy Roman Empire.
The title of Arch-Treasurer was only ceremonially significant, as it was only used in the coronation of Emperors.
The electorate and Arch-Stewardship was given to Bavaria by the emperor Ferdinand II.
After the war, a new electoral position was given to Frederick's son, Charles, and the office of Arch-Treasurer was created for him in 1652.
The Bavarian elector was reinstated in 1714, so the Bavarian, Palatine and Hanoverian electors' offices changed to Arch-Steward, Arch-Treasurer and Arch-Bannerbearer, respectively, but the House of Hanover kept using the shield of the Arch-treasurership anyway (see Royal coat of arms of Great Britain).