Conventionsthaler

thumb|upright=1.2|: Francis I, Emperor of Austria, 1822; [[Frederick Augustus I, King of Saxony, 1813, Dresden Mint]]

The or ("Convention "), was a standard silver coin in the Austrian Empire and the southern German states of the Holy Roman Empire from the mid-18th to early 19th-centuries. Its most famous example is the Maria Theresa thaler which is still minted today. The was equivalent to a .