The project was financed using only private capital: Sandor Ujfalfy bequeathed his domains and estates from Szolnok-Doboka County to the National Theatre Fund from Kolozsvár.

Some famous actors of the time include Magda Tâlvan, Maria Cupcea, Titus Croitoru, Violeta Boitoș, Viorica Iuga, Nicolae Sasu, and Gheorghe Aurelian.

After 1965, with Vlad Mugur as director, the theatre focused on aesthetic values, refusing the ideological and moralising line imposed by the increasingly strict Communist authorities.

In this period the National Theatre established itself as an important European theatrical institution, due to the prestigious artistic tours in Italy with performances such as Iphigeneia in Tauris by Euripides, Caligula by Albert Camus, A Midsummer Night's Dream by William Shakespeare.

Among the young famous artists of the time there were Silvia Popovici [ro], Valentino Dain, Melania Ursu, Valeria Seciu, George Motoi, Dorel Vișan, and Anton Tauf.

Famous artists of the time include Mihai Măniuțiu, Gelu Bogdan Ivașcu, Maria Munteanu, Ileana Negru, Miriam Cuibus, Marius Bodochi, Petre Băcioiu, and Dorin Andone.

In this period, performances such as Săptămîna luminată by Mihail Săulescu, The Lesson by Eugène Ionesco, and Murder in the Cathedral by T. S. Eliot were staged during several tours in England, France, Yugoslavia, Finland, the United States, and Egypt.