Opened on June 1, 2022, the Royal Treasure Museum is located in the west wing of the Ajuda National Palace, in Lisbon, and displays a collection of more than a thousand items forming the Crown jewels and items of Portuguese royal jewellery.

The priceless collection exhibited at the Royal Treasure Museum consists of rare and valuable jewels, insignia and decorations, coins and items of civil and religious jewellery. These symbols of power and personal luxury objects represent one of the most important collections in the world, due to their size, rarity and quality. They tell the story of Portugal experienced from the Ajuda National Palace, the home of the last kings of Portugal. The Royal Treasure Museum is housed in one of the largest vaults in the world.

The permanent exhibition was designed in eleven nuclei, integrated in three floors of the vault, in an in-depth approach to the origin and journey of the items that compose them: Gold and Diamonds from Brazil, Crown Coins and Medals, Jewels, Honorary Orders, Royal Insignia, Crown Apparatus Silver, Private Collections, Diplomatic Offers, Royal Chapel, Royal Table and Treasure Journeys.