11 moments
Birth in London
· London, England

Wikimedia Commons · Public domain · file Augusta Ada Byron, later Ada Lovelace, was born in London. This is the starting point of her documented life. The source identifies London rather than a specific birth building; coordinates represent central London.
Taken to Kirkby Mallory
· Kirkby Mallory, Leicestershire, England

Wikimedia Commons · Creative Commons Attribution-ShareAlike 4.0 International · file At five weeks old, Ada was taken by her mother to her maternal grandparents' home after her parents' separation. Coordinates represent the village; Kirkby Hall, where she stayed, was later demolished.
First meeting with Charles Babbage
· 1 Dorset Street, Marylebone, London, England

Wikimedia Commons · Public domain · file Ada Byron attended one of Charles Babbage's scientific soirées with her mother and Mary Somerville, beginning the relationship that led to her work on the Analytical Engine. The soirée article states that Babbage held these gatherings at his home in Dorset Street, Marylebone; coordinates are a representative point for the former Dorset Street address.
Honeymoon at Ashley Combe
· Ashley Combe, Porlock Weir, Somerset, England
Following her marriage to William King, Ada spent her honeymoon at Ashley Combe, which later became a family summer retreat. Ashley Combe House was demolished in 1974; coordinates are for Ashley Combe Lodge, at the documented estate site.
Move to St James's Square
· 12 St James's Square, St James's, London, England

Wikimedia Commons · Creative Commons Attribution-ShareAlike 4.0 International · file Ada moved with her family into 12 St James's Square, her principal documented London residence during the period in which she developed her major work on the Analytical Engine.
Analytical Engine work at St James's Square
· 12 St James's Square, St James's, London, England

Wikimedia Commons · Public domain · file While living at 12 St James's Square, Lovelace wrote to Babbage while preparing her extensive notes to her translation of Menabrea's paper, including her Bernoulli-number algorithm.
Visit to Andrew Crosse at Broomfield
· Fyne Court, Broomfield, Somerset, England

Wikimedia Commons · Creative Commons Attribution-ShareAlike 2.0 Generic · file Lovelace visited electrical experimenter Andrew Crosse at Broomfield, part of her documented interest in electrical experimentation and related scientific inquiry. The quoted source establishes Broomfield but not the precise house; Fyne Court was Andrew Crosse's Broomfield home and provides a defensible site coordinate.
Letter to Faraday from Ashley Combe
· Ashley Combe, Porlock Weir, Somerset, England
Lovelace wrote Michael Faraday from Ashley Combe about scientific cooperation and her intended review of his electrical research. Ashley Combe House was demolished; coordinates represent the surviving Ashley Combe Lodge and estate entrance.
Horsley Towers becomes main family house
· Horsley Towers, East Horsley, Surrey, England

Wikimedia Commons · Creative Commons Attribution-ShareAlike 2.0 Generic · file From 1845 the Lovelace family's main house was Horsley Towers, a Surrey residence later enlarged to Lovelace's designs. The source identifies this as the family's main house from 1845; it does not establish that she ceased using her London residence immediately.
Death in Marylebone
· Marylebone, London, England

Wikimedia Commons · Public domain · file Lovelace died aged 36 after several months of illness. Her death ended a life of mathematical and scientific work centered on Babbage's Analytical Engine. The source specifies Marylebone but not an exact death address; coordinates represent central Marylebone.
Burial beside Lord Byron
· Church of St Mary Magdalene, Hucknall, Nottinghamshire, England

Wikimedia Commons · Public domain · file Lovelace was buried in the Byron family vault at Hucknall, beside her father, in accordance with her expressed wish. The quoted burial-register transcription documents her burial; the church is the site of the Byron family vault.