{"geometry":{"type":"Point","coordinates":[-0.144907,51.520829]},"type":"Feature","properties":{"entry-date":"2026-10-23","start-date":"1954-09-10","end-date":"","entity":31683618,"name":"56 AND 58, PORTLAND PLACE W1","dataset":"listed-building","typology":"geography","reference":"1227040","prefix":"listed-building","organisation-entity":16,"quality":"authoritative","documentation-url":"https://historicengland.org.uk/listing/the-list/list-entry/1227040","listed-building-grade":"II*"}}