ðə bˈɪzɐntˌiːn ˈɛmpaɪɚ ɹˌiːɪstˈæblɪʃt kəntɹˈoʊl ˌoʊvɚ pænˈoʊniə ɪnðɪ ɪlˈɛvənθ sˈɛntʃɚɹi, lˈiːdɪŋ tə ðə kɹiːˈeɪʃən ʌvðə θˈiːm ʌv sˈɜːmiəm tʊ ɐdmˈɪnɪstɚ ðə ɹˈiːdʒən, bˌʌt nˌɑːt lˈæstɪŋ lˈɔŋ.
The Byzantine Empire re-established control over Pannonia in the 11th century, leading to the creation of the Theme of Sirmium to administer the region, but not lasting long.