Norman stone keeps played both a military and a political role. Most of the keeps were physically extremely robust and, while they were not designed as an intended location for the final defence of a castle, they were often placed near weak points in the walls to provide supporting fire. Many keeps made compromises to purely military utility: Norwich Castle included elaborate blind arcading on the outside of the building, in a Roman style, and appears to had a ceremonial entrance route; The interior of the keep at Hedingham could have hosted impressive ceremonies and events, but contained numerous flaws from a military perspective. Similarly there has been extensive debate over the role of Orford Castle whose expensive, three-cornered design most closely echoes imperial Byzantine palaces and may have been intended by Henry II to be more symbolic than military in nature.