A gold coin, issued by the Second Mexican Empire in 1866, in the denomination of 20 pesos. It depicts Maximilian I of Mexico (r. 1864–67) on its obverse, with the coat of arms of Mexico on its reverse. Mexico still uses the peso as its currency, although the original peso was replaced in 1993 with the new peso, which had 1000 times the value of its predecessor.Photograph: National Numismatic Collection, National Museum of American History