æz ˈɜːli æz wˈʌn θˈaʊzənd wˈʌnhˈʌndɹɪd fˈɪfti nˈaɪn hˈɛɹæd hæd bɪɡˈʌn wɪðˌɪn ðə klˈɔɪstɚ wˈɔːlz ðə wˈɜːk fɔːɹ wˌɪtʃ ʃiː ɪz bˈɛst nˈoʊn, ðə hˈɔːɹɾəs dᵻlˈɪʃaɪɚɹəm, ɐ kəmpˈɛndiəm ʌv ˈɔːl ðə sˈaɪənsᵻz stˈʌdid æt ðæt tˈaɪm.
As early as 1159 Herrad had begun within the cloister walls the work for which she is best known, the Hortus deliciarum, a compendium of all the sciences studied at that time.