hɪz pɹəpˈoʊzəl wʌz ɐpɹˈuːvd baɪ ðə mjuːnˈɪsɪpˈælᵻɾi ˌɔn θɹˈiː dʒuːlˈaɪ nˈaɪntiːnhˈʌndɹɪd ɪlˈɛvən, bˌʌt dᵻlˈeɪd baɪ wˈɜːld wˈɔːɹ ˈaɪ. kənstɹˈʌkʃən wˈɜːk stˈɑːɹɾᵻd ˌɔn sˈɛvəntˌiːn dʒuːlˈaɪ nˈaɪntiːnhˈʌndɹɪd twˈɛnti θɹˈiː; ðə ɡɹˈænd stˈɛɹkeɪs wʌz ˈoʊpənd ˌɔn twˈɛnti tˈuː dᵻsˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈaɪv, bᵻfˌoːɹ bˌiːɪŋ fˈɔːɹməli ɪnˈɔːɡjʊɹˌeɪɾᵻd baɪ pɹˈɛzɪdənt ɡˈæstən dˈaʊmɚɡ ˌɔn twˈɛnti fˈoːɹ ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɛvən.
His proposal was approved by the municipality on 3 July 1911, but delayed by World War I. Construction work started on 17 July 1923; the grand staircase was opened on 22 December 1925, before being formally inaugurated by President Gaston Doumergue on 24 April 1927.