The collections of the Mujex will be progressively gathered by transfer of existing public or private collections.

The first object received by the Mujex is an imperial firman impérial dated 1878 by Ottoman sultan Abdülhamid II (1842-1918) giving Eugène Lambert (1833-1881) the title of General consul of Turkey in Anvers (Belgium). This firman was given to the Mujex by his great grand-son Hubert Lévy-Lambert.