Thomas Newenham Deane
Irish architect (1828–1899)

Sir Thomas Newenham Deane (1828 – 8 November 1899) was an Irish architect, the son of Sir Thomas Deane and Eliza Newenham, and the father of Sir Thomas Manly Deane. His father and son were also architects.
Works attributed to Thomas Newenham Deane, and his architectural practice, include the National Library of Ireland, a wing of the National Gallery of Ireland, St Mary's Cathedral, Tuam, the Kildare Street Club, and a number of buildings in the Trinity College Dublin campus.
Early life
Sir Thomas Newenham Deane was born on the 15 of June in 1828 near Cork, Ireland. He was the son of Sir Thomas Deane, an architect, and Eliza O’Callaghan Newenham, Sir Thomas Deane's second wife. Deane was born as the oldest of 3 siblings. As the only son Deane had two younger sisters, Susanna Adelaide (Ada) and Olivia Louisa. From his father's first marriage the three siblings had a step-brother John Connellan and a step-sister Julia Connellan. Deane is described as being a shy and reserved child who struggled with a stammer. The firm had grown to become a successful business and one of the most prominent practises in Ireland.
“Thomas Newenham Deane” enters the record as irish architect (1828–1899). Crown Archives preserves that source wording while asking what Thomas, Newenham and Deane can confirm, complicate or overturn.
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Biographical claims are most persuasive when dates, appointments and relationships can be traced to records created close to the events described. The source revision retrieved here is dated Oct 10, 2025. The linked authority identifier is Q7792724. VIAF identifies the subject as 62390526. The Library of Congress control number is nr94013056. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1828 and 1899.
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This entry incorporates text from “Thomas Newenham Deane” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.