Charles Rennie Mackintosh was born Charles Rennie McIntosh in Dennistoun, Glasgow, Scotland, on 7 January 1868. From 1884 to 1888 he was an articled to John Hutchison (c.1841-1908) in Glasgow. In late 1888 or early 1889 he began working a draughtsman with Honeyman and Keppie, a recently-established Glasgow-based architectural practice formed by John Honeyman (1831-1914) and John Keppie (1862-1945). From 1883 to 1894 Mackintosh also attended evening classes at Glasgow School of Art. In c.1896 he became senior assistant to Honeyman & Keppie, and, following the retirement of Honeyman in January 1901, he was taken into partnership and the practice title became Honeyman, Keppie & Mackintosh. In 1900 he married Margaret Macdonald (1864-1933), with whom he would subsequently collaborate on projects.
The partnership with Honeyman and Keppie was dissolved in June 1913 and Mackintosh set up his own independent practice in Glasgow. After living briefly in Walberswick, Suffolk, in August 1915 the Mackintoshes moved to Chelsea in London where they established studios at 43A, Glebe Place. In January 1924 they moved to France and over the next three years lived in Amelie-les-bains, Ille-sur-Tet and Port Vendres. By September 1927, for reasons of health, they were forced to return to London, where Charles Rennie Mackintosh died on 10 December 1928.
For a comprehensive list of architectural projects by Mackintosh see the Dictionary of Scottish Architects https://www.scottisharchitects.org.uk/architect_full.php?id=200362.
For a comprehensive bibliography of writings on Mackintosh see AHR Biographical Dictionary of British and Irish Architects 1800-1950 https://architecture.arthistoryresearch.net/architects/mackintosh-charles-rennie
In addition to his work as an architect, Mackintosh was also a painter and a versatile designer in many fields including textiles, jewellery, furniture, interiors, tiles, books, wallpaper, and stained glass. Between 1891 and 1923 he exhibited at the Royal Glasgow Institute of the Fine Arts, Goupil Gallery in London, and at the Royal Scottish Academy of Painters in Water Colours.
Text source: Art History Research net (AHR net)