Four Crystal Skulls for #MuseumsUnlocked.
First, from the @quaibranly, this rock crystal skull was bought as an Aztec artefact from dealer Eugène Boban by Alphonse Pinart, and donated to the Trocadéro, Paris. It's now believed to be a 19th-century fake. (1/4)

(2/4) Then in London - Here's the rock crystal skull in the @britishmuseum. Bought from Bobin by Tiffany and Company, and in turn purchased by the museum in the 1890s - it is also generally believed to be a 19th-century fake #MuseumsUnlocked

(3/4) In Washington, DC: The @smithsonian's crystal skull reportedly "arrived in the mail with an unsigned letter in 1992, stating that it was purchased in Mexico in 1960 and was Aztec." It's understood now, as with the London and Paris examples, to be a fake. #MuseumsUnlocked

(4/4) But here's what is generally understood to be a smaller 16th-century Aztec crystal skull incorporated into a later 17th-century reliquary cross—seen here in the publication of a 1971 Met exhibition from the private collection of the Redo family, Mexico City #MuseumsUnlocked