And it celebrates the founding of Tenochtitlán, where Mexico City is located. It is based on a mural by Diego Rivera, Frida Kahlo’s lover of many years. It shows the Mexica capital of Tenochtitlán on one side and an axolotl on the other. In the foreground of the obverse side of the new, purple-colored polymer 50-peso note is an image of the rear view of the Teocalli of the Sacred War, a stone miniature of a Mexica, or Aztec, temple that was carved on the orders of Moctezuma II, ruler of Tenochtitlán when the Spanish arrived in the early 16th century.
The reverse side of the new 50-peso bill features an axolotl, a species of salamander endemic to the waterways of the Mexico City borough of Xochimilco. In the background are chinampas, or floating gardens, where corn is being grown, ahuejotes, or native willow trees, and a boat on the surface of a Xochimilco canal.