In the 18th century it was used predominantly in the northern states as a coin worth ​1⁄24 of a Reichsthaler (equal to ​1⁄32 of a Conventionsthaler). In the 19th century, beginning in 1821 in Prussia, a new currency system was introduced in which the Groschen — often called the Silbergroschen (Prussia, from 1821) or Neugroschen (Saxony, from 1840) to distinguish it from older Groschen — was worth ​1⁄30 of a Thaler or Taler. Following German unification and decimalisation, the Groschen was replaced by the 10 pfennig coin and Groschen remained a nickname for the 10 pfennig coin until the introduction of the euro.