The square was built in 1821 at the site of the ruins of a medieval Capuchin monastery, which had been abolished during the reign of Habsburg Emperor Joseph II. The square was used for ceremonial purposes during the post-Napoleonic Congress of Ljubljana, after which it was named. After the congress, a park was laid out in the center of the square, which soon acquired the name Star Park (, ) due to its layout. During the communist period it was renamed Revolution Square () and a few years later Liberation Square (), but the local population continued to use the old name. In 1990, it regained its original name.