The Maharaja of Indore Necklace is a diamond and emerald-studded necklace. As of 2008, it is on display at the National Museum of Natural History in Washington, D.C., United States. It was originally named the Spanish Inquisition Necklace by the American jeweller Harry Winston, though it had no known connection with the historical Spanish Inquisition.[1] The name was changed in 2021 by the Smithsonian Institution[2] to reflect its actual provenance, having been first owned by Tukoji Rao III, Maharaja of Indore in the early 20th century.