From the start of the French Revolution in 1789 until 1792, Les Neuf Sœurs became a "Société Nationale".
fɹʌmðə stˈɑːɹt ʌvðə fɹˈɛntʃ ɹˌɛvəlˈuːʃən ɪn wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd ˈeɪɾi nˈaɪn ʌntˈɪl wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd nˈaɪnti tˈuː, lˈɛs nˈuːf sˈoʊɜːz bɪkˌeɪm ˈeɪ "sˌoʊsɪˈeɪtˈeɪ nˈæʃəneɪl".