Halifax Citadel National Historic Site of Canada

• the evolved cultural landscape comprising its star-shaped footprint, the profile of its built features, its open ground, and remnants of 18th-20th-century military activity including the glacis, the footprint of Fort George, extant historic buildings, structures, site roads, remains and landscape features,
• siting on a drumlin centrally located on the peninsula adjacent to Halifax harbour,
• the open ground that surrounds it (the lack of trees on the glacis),
• the 1930s perimeter roadway connecting the Citadel to the town, and roadways, pathways, channels and tunnels providing internal communications,
• viewplanes to the inner harbour, to landward approaches, to other harbour defences, to the town blocks adjacent to the harbour and those historically linked to the Citadel such as Royal Artillery Park, the Commons, and the Public Garden.

The fort:

• the bastion design with star-shaped footprint and profile,
• functional design, found form, materials and spatial relationships of elements including the parade, south-east and north-east salients, the redan, the south-west and north-west demi-bastions and the west front, fort walls, casemates, counter-mine tunnels and musket gallery, the ditch, ravelins and glacis, south magazine, and north magazine (canteen building).

Defensive works outside the fort:

• the siting, mass, design and spatial relationships of extant military resources on the hill including casemates, north and south magazines, two expense magazines on the ramparts, the Cavelier building,
• the found materials of their construction (primarily stone with supplementary brick as structural support in such areas as casemate arches).

Archaeological remains

• the footprints, materials and spatial relationships of early military facilities including gun emplacements on the ramparts (for smooth bores and RMLs), a barracks foundation, cisterns with a drainage system beneath the parade, a tunnel under the glacis' west side.