Early life
Markievicz was born Constance Georgine Gore-Booth on 4 February 1868 at 7 Buckingham Gate, London to Henry Gore-Booth (later Sir Henry Gore-Booth, 5th Baronet) and Georgina Mary Gore-Booth (née Hill, later Lady Georgina Gore-Booth). Markievicz's father was an Anglo-Irish arctic explorer and later landowner and landlord of Lissadell House, and her mother was British and founded the Lissadell School of needlework. Following the death of her paternal grandfather Sir Robert Gore-Booth, 4th Baronet in 1876, Markievicz's father became the 5th Baronet of Artarman and took over the running of the family estate.
The eldest of five siblings, Markievicz was the sister of the poet and labour activist Eva Gore-Booth. During the Irish Famine of 1879, Markievicz's father reinstated the Carney and Drumcliffe Relief Committees and provided free food donations to his tenants. Their father's example inspired in Gore-Booth and her younger sister, Eva, a deep concern for working people and the poor. The sisters were childhood friends of the poet W. B. Yeats, who frequently visited the family home Lissadell House, and were influenced by his artistic and political ideas. Yeats wrote a poem, "In Memory of Eva Gore-Booth and Con Markiewicz", in which he described the sisters as "two girls in silk kimono, both beautiful, one a gazelle", the gazelle being Eva, whom Yeats described as having "a gazelle-like beauty". Eva later became involved in the labour movement and women's suffrage in Great Britain, although initially Constance did not share her sister's ideals.
Gore-Booth wished to train as a painter, to her family's dismay; in 1892, she went to study at the Slade School of Art in London, where she lived at the Alexandra House for Art Pupils, Kensington Gore, founded five years before by Sir Francis Cook, a wealthy great-uncle of Maud Gonne. One of her contemporaries there was Blanche Georgiana Vulliamy. It was at this time that Gore-Booth first became politically active and joined the National Union of Women's Suffrage Societies (NUWSS). Later she moved to Paris and enrolled at the prestigious Académie Julian where she met her future husband, Casimir Markievicz (Kazimierz Markiewicz) an artist from a wealthy Polish landowning family in present-day Ukraine (then under the rule of the Russian Empire).
The Markieviczes (or Markiewiczes) settled in Dublin in 1903 and moved in artistic and literary circles, with Constance gaining a reputation as a landscape painter. In 1905, along with artists Sarah Purser, Nathaniel Hone, Walter Osborne and John Butler Yeats, she was instrumental in founding the United Arts Club, which was an attempt to bring together all those in Dublin with an artistic and literary bent. This group included the leading figures of the Gaelic League founded by the future first President of Ireland, Douglas Hyde. Although formally concerned only with the preservation of the Irish language and culture, the league brought together many patriots and future political leaders. Sarah Purser, whom the young Gore-Booth sisters first met in 1882, when she was commissioned to paint their portrait, hosted a regular salon where artists, writers and intellectuals on both sides of the nationalist divide gathered. At Purser's house, Markievicz met revolutionary patriots Michael Davitt, John O'Leary and Maud Gonne. In 1907, Markievicz rented a cottage in the countryside near Dublin. The previous tenant, the poet Padraic Colum, had left behind copies of The Peasant and Sinn Féin. These revolutionary journals promoted independence from British rule. Markievicz read them and was propelled into action.