{"entry-date":"2026-09-30","start-date":"1970-02-05","end-date":"","entity":31680219,"name":"54, MOUNT STREET, W1","dataset":"listed-building","typology":"geography","reference":"1223620","prefix":"listed-building","organisation-entity":16,"geometry":"","point":"POINT (-0.153616 51.509357)","quality":"authoritative","documentation-url":"https://historicengland.org.uk/listing/the-list/list-entry/1223620","listed-building-grade":"II*"}