After working on it for three years, Lotte Reiniger released the German feature-length silhouette animation Die Abenteuer des Prinzen Achmed in 1926, the oldest extant animated feature.
ˈæftɚ wˈɜːkɪŋ ˌɔn ɪt fɔːɹ θɹˈiː jˈɪɹz, lˈɑːt ɹˌiːɪnˈaɪdʒɚ ɹᵻlˈiːst ðə dʒˈɜːmən fˈiːtʃɚlˈɛŋθ sˌɪlʊwˈɛt ˌænɪmˈeɪʃən dˈaɪ ɐbˈɛntjuːɚ dˈɛs pɹˈɪnzən ɐtʃəmd ɪn nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɪks, ðɪ ˈoʊldɪst ɛkstˈænt ˈænɪmˌeɪɾᵻd fˈiːtʃɚ.