Mary Harriet "Mainie" Jellett (29 April 1897, Dublin – 16 February 1944, Dublin) was an Irish painter whose Decoration (1923) was among the first abstract paintings shown in Ireland when it was exhibited at the Society of Dublin Painters Group Show in 1923. She was a strong promoter and defender of modern art in her country, and her artworks are present in museums in Ireland. Her work was also part of the painting event in the art competition at the 1928 Summer Olympics. Life Jellett was born on 29 April 1897 at 36 Fitzwilliam Square, Dublin, one of the four daughters of William Morgan Jellett, a barrister and later MP, and Janet McKenzie Stokes. William and Eva were among the seven children of John Hewitt Jellett, Provost of Trinity College Dublin. Mainie's mother was an accomplished musician, and all her daughters received a musical education. Mainie's sister Dorothea (Bay) was the orchestra conductor at the Gaiety Theatre, Dublin. Her aunt was Eva Jellett, a pioneering doctor working in India. Jellett's art education began at 11 when she received painting lessons from Elizabeth Yeats, Sarah Cecilia Harrison, and Mary Manning, who had a studio on Merrion Row, and whose influence on Irish Artists of the time was considerable. She later studied at the Metropolitan School of Art in Dublin. Her teachers included William Orpen, and his influence is apparent in her work from this period. Despite her artistic talent, she was still undecided about her future, and at this time took regular piano lessons with the intent of becoming a concert pianist. She decided to become a painter after working under Walter Sickert at the Westminster Technical Institute in London, where she enrolled in 1917 and remained until 1919. She showed precocious talent as an artist in the impressionist style. In 1920, she won the Taylor Art Scholarship worth £50. The same year, she submitted work to the annual exhibition of the Royal Hibernian Academy. In 1921, along with her companion Evie Hone, she moved to Paris. There she worked under André Lhote and Albert Gleizes, encountering cubism and beginning an exploration of abstract art. Her new style, including colour and rhythm, was greatly inspired by her stay in France. After 1921, she and Evie Hone returned to Dublin, but for the next decade, they spent part of each year in Paris. In a 1943 essay entitled 'Definition of my Art'