Reichsthaler, also known as the thaler, was a currency used in various regions of Europe during the 16th, 17th, and 18th centuries. The term 'thaler' became so popular that it was widely used, and various countries gave different names to their version of the currency. In Germany, Reichsthaler simply translates to "rich thaler". Other synonyms of the term include taler, tálar, daalder, and dollar. The name "dollar" itself is believed to have been derived from the thaler, as many European countries who used the currency in the past also introduced their own dollars. Today, the term 'thaler' is also commonly used to refer to old coins that were used as currency in the past.