ðə nˈoːɹmənz ɹˌiːɪnfˈoːɹst ðɪ ˈɛɹiə baɪ bˈɪldɪŋ tˈuː kˈæsəlz ɪnsˈaɪd ðə ɹˈoʊmən wˈɔːlz ðæt ɹˈæn nˈɔːɹθ sˈaʊθ, ɡˈɪvɪŋ ðɛɹ nˈeɪm tə ðə stɹˈiːt ʌv ˈoʊld bˈeɪli ænd ðˈɛn ɹˈʌfli fˈɑːloʊɪŋ ðə mˈɑːdɚn blˈækfɹaɪɚz lˈeɪn dˌaʊn tə ðə tˈɛmz.
The Normans reinforced the area by building two castles inside the Roman walls that ran north–south, giving their name to the street of Old Bailey and then roughly following the modern Blackfriars Lane down to the Thames.