Grade I 'Buildings of exceptional interest' and only make up three per cent of the total across England - usually cathedrals and great country houses. The mausoleum on Stone Road is Stoke-on-Trent's only grade I listed building.
It was built in 1808  for the Marquis of Stafford. It was used as the last resting place for of members of the Levison-Gower family.

Grade II* are 'particularly important buildings of more than special interest' and make up about five per cent of the total - typically a good manor house or something early or with good interior features or of strong historic interest.