In 1991 Petrovaradin Fortress was added to Spatial Cultural-Historical Units of Great Importance list of the Republic of Serbia.
ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti wˈʌn pˈɛtɹəvˌæɹɐdˌɪn fˈɔːɹtɹəs wʌz ˈædᵻd tə spˈeɪʃəl kˈʌltʃɚɹəlhɪstˈɔːɹɪkəl jˈuːnɪts ʌv ɡɹˈeɪt ɪmpˈoːɹtəns lˈɪst ʌvðə ɹᵻpˈʌblɪk ʌv sˈɜːbiə.