The Museum of Atlia (MUDEAT) was made official on 13 January, 2023 A.D. by Imperial Proclamation No. 6, which places it under the administration of the Imperial Throne. MUDEAT has the Museum of Micronational Artifacts (MAM) under its administration.
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The Museum of Atlia has a varied collection of historical objects and is responsible for their preservation and display for the benefit of future generations.

Most of its gallery is part of Prince Luis' private collection, among which are works of art made by the Prince, two typewriters, a small numismatic collection, the 2017 VIDEO CAELO eclipse projector, old flags of Atlia, among other things.