Watson suggests that a motte and keep may have existed to the east of the Ludgate Hill entrance of Ludgate Square.
wˈɑːtsən sədʒˈɛsts ðˌæɾə mˈɑːt ænd kˈiːp mˌeɪhɐv ɛɡzˈɪstᵻd tə ðɪ ˈiːst ʌvðə lˈʌdɡeɪt hˈɪl ˈɛntɹəns ʌv lˈʌdɡeɪt skwˈɛɹ.