{"echo_id":"4e6ff504-45aa-496d-8c79-f4443a099175","kind":"place","canonical_name":"12 St James’s Square","aliases":["12 St James's Square","10 St James's Square","St James's Square town house"],"summary":"12 St James’s Square (formerly 10) was the Lovelace London town house from about 1837 to 1846. Built for them in the Italianate style by Thomas Cubitt. An English Heritage blue plaque records that Ada Countess of Lovelace lived here. The address is associated with the period of the 1843 Notes. This Place Echo locks the London residence phase. It is not the birthplace. It is not the death house. It is not a Relic and not a Chamber.","years":"c. 1837–1846","place_hint":"12 St James's Square, St James's, London SW1Y 4RB","tags":["london","place","st-jamess-square","lovelace","town-house","blue-plaque","pilot"],"verified":false,"public_publish":true,"primary_image_url":null,"primary_image_type":"none","is_placeholder":false,"image_is_placeholder":false,"created_at":"2026-10-14T06:50:08.304Z","updated_at":"2026-10-14T06:50:08.304Z","parent_place_echo_id":"5d7baa66-7118-4a1e-8281-1990ac2064f1","place_grain":"site","nested_places":[],"parent_place":{"echo_id":"5d7baa66-7118-4a1e-8281-1990ac2064f1","kind":"place","canonical_name":"London"}}