The mansion has three historicist facades harmoniously combining Renaissance and Baroque elements. In its own times it represented a typical town house designed according to the representation programme. The painted decoration in imitation of sgraffito makes it unique in the architecture of Belgrade. The painted decoration was the work of Domenico D'Andrea, an Italian master. In terms of the internal conception, the basis of the ground floor and the first floor are the same. The salon, the dining room and the kitchen were on the ground floor, and the bedrooms, the study, the library and the balcony overlooking the former garden were on the upper floor. The impressive entrance hall features white marble stairs with wrought-iron railings and a wall decorated with a composition in relief. The rich and diverse collection of movables, dating from the 18th, 19th and 20th centuries, comprises art works and utility objects, as well as the archival material. The arms collection from the First and Second Serbian Insurrections was awarded a golden diploma and a medal at the Balkan States Exhibition in London in 1907. The collection spans generations of the Grujić family – from Teodor Herbez, finance minister under Prince Miloš, Jevrem Grujić, Slavko Grujić, General Kosta Protić, Stevan Ćurčić and many other family members, prominent figures of the political and cultural life in Serbia. The interior is adorned with the works of the most important painters of the national art: Stevan Todorović, Uroš Predić, Paja Jovanović, Đorđe Krstić, Uroš Knežević, Arsenije Petrović, Miloš Tenković, Vlaho Bukovac as well as with the original pieces of furniture of different epochs. Along with the material values, the house also has intangible values. One of the important objects kept in this house is the wedding dress of Jelena Grujić from 1856.