Inside, the building is furnished with paintings and frescoes by a selection of Slovenian artists. The largest, a wall painting by the 20th century mural artist Slavko Pengov, extends across the length of the entrance hall and illustrates the history of Slovenians. Created in 1958 and 1959, the mural portrays events including the Revolutions of 1848, the First World War and the 1918 creation of the Kingdom of Serbs, Croats and Slovenes, the Second World War and national liberation, and the creation of socialist Yugoslavia and homeland reconstruction. The walls of the first-floor corridor are furnished with portraits of former Presidents of the National Assembly. Following the 1991 independence of Slovenia, the building's interior has been refurbished several times to suit the desideratum of the new Slovenian Parliament.