ðə ɹˌɛstɚɹˈeɪʃən wʌz kəmplˈiːɾᵻd ɪn ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd fˈɪfti nˈaɪn ɪn tˈaɪm fɚðə ɡˈoʊldən dʒˈuːbɪlˌiː ʌvðə kɐθˈiːdɹəl ænd ðə sˈɛvənti fˈɪfθ ˌænɪvˈɜːsɚɹi ʌvðə dɪoʊsˈiːz ʌv hɛlˈiːnə.
The restoration was completed in April 1959 in time for the golden jubilee of the cathedral and the 75th anniversary of the Diocese of Helena.