ðə dɪoʊsˈiːz ɹˌiːɐpˈɪɹz tˈuː sˈɛntʃɚɹiz lˈeɪɾɚ, wˌɛn ɪn fˈaɪvhˈʌndɹɪd ˈeɪɾi nˈaɪn ɐ bˈɪʃəp ʌv kˈæstʃəlˌoʊ, wˌɪtʃ baɪ ðˈɛn wʌz ˌʌndɚ vˈɪsɪɡˌɑːθ ɹˈuːl ænd ɐ sˈʌfɹæɡən ʌvðə mˌɛtɹəpˈɑːlɪtən ʌv tɑːlˈiːdoʊ, tˈʊk pˈɑːɹt ɪnðə θˈɜːd kˈaʊnsəl ʌv tɑːlˈiːdoʊ.
The diocese reappears two centuries later, when in 589 a bishop of Castulo, which by then was under Visigoth rule and a suffragan of the Metropolitan of Toledo, took part in the third Council of Toledo.