It opened in 1959, on the occasion of the one hundred year anniversary of the Union, in a historic and architectonic monument building, raised between 1800 and 1806, in a Neoclassical style. The exhibits include history items illustrating the Revolution of 1848, the Union of Moldavia and Wallachia in 1859 (documents, pieces of furniture and interior decoration objects, as well as belongings of Al. I. Cuza, Mihail Kogălniceanu, and Vasile Alecsandri and other personalities of that time).