In 1918, it became the house of Alexander Karađorđević, Prince Regent of Yugoslavia and was used as a theatre before it became public property after World War II.

[2] Architect Jovan Ilkić designed the Neo-Baroque[3] or Academic art-style house for Marko O. Marković, a merchant, and his family.

[citation needed] The Royal Palace was damaged during the First World War, and between 1918 and 1922, the house served as the residence of Aleksandar Karađorđević and the Court of the Kingdom of Serbia.

On 1 December 1918, the document was signed that created the Kingdom of Serbs, Croats and Slovenes,[6][7] after which he gave a speech from the house to people of Belgrade.

"[2] It sits on a slope,[4] with a base of 30 metres, with the street side of the building on high ground, and the back of the house is two floors, with the access to the garden.