Theresa Vane-Tempest-Stewart, Marchioness of Londonderry

The Most Honourable The Marchioness of Londonderry
Theresa, Marchioness of Londonderry by John Singer Sargent[1]
Born	Lady Theresa Susey Helen Chetwynd-Talbot (1856-06-06)6 June 1856 Ingestre Hall, Staffordshire, England
Died	16 March 1919(1919-03-16) (aged 62)
Nationality	British
Occupation(s)	Socialite, political hostess
Spouse	Charles Vane-Tempest-Stewart, 6th Marquess of Londonderry ​ ​ (m. 1875; died 1915)​
Children	Charles Vane-Tempest-Stewart, 7th Marquess of Londonderry Lord Reginald Vane-Tempest-Stewart Helen Fox-Strangways, Countess of Ilchester
Parent(s)	Charles Chetwynd-Talbot, 19th Earl of Shrewsbury Anna Theresa Cockerell

Theresa Susey Helen Vane-Tempest-Stewart, Marchioness of Londonderry (née Chetwynd-Talbot; 6 June 1856 – 16 March 1919) was a British socialite and political hostess. She was a leading Unionist campaigner against Irish Home Rule, serving as president of the Ulster Women's Unionist Council from 1913 to 1919. She was said to be one of the most "dominating feminine personalities" of the time and was referred to as the "Queen of Toryism" and a "highwaywoman in a tiara."