 A new South Entrance was also provided to the south (built where the South Military Road crossed a new extension to the South Lines, close to the junction with Citadel Road).Also known as Archcliffe Gate, this monumental stone gatehouse was demolished in the 1960s.As well as helping protect the Heights from landward attack, the earthworks served to enclose a sizeable area of land (lying between the Citadel and the Redoubt, the North Lines and the escarpments to the south and east.