'''Mary Jane Long''', [[Order of the British Empire|OBE]], (31 July 1939 – 3 September 2018), known as '''MJ Long''', was aan American [[architect]], [[lecturer]] and author, best known for her work as a principal architect partner on the [[British Library]] in London (with her husband [[Colin St John Wilson]]).<ref name=GuardianObit>{{cite news|title=MJ Long obituary|author=Peter Carolin|url=https://www.theguardian.com/artanddesign/2018/sep/18/mj-long-obituary|publisher=Guardian|accessdate=16 October 2018|date=18 September 2018}}</ref> She created a series of purpose-built studios for the artists [[Peter Blake]], [[RB Kitaj]], [[Paul Huxley]] and [[Frank Auerbach]], later documenting these in a book.<ref name=AJObit>{{cite news|title=‘Inspirational’ British Library architect MJ Long dies, aged 79|author=Richard Waite|url=https://www.architectsjournal.co.uk/news/inspirational-british-library-architect-mj-long-dies-aged-79/10034833.article|publisher=Architect's Journal|accessdate=18 October 2018|date=5 September 2018}}</ref> In partnership with with [[Rolfe Kentish]], she focused on designing museum, libraries and galleries, including the [[National Maritime Museum Cornwall]], the [[Jewish Museum London]] in [[Camden Town]] and an extension to [[Pallant House Gallery]].<ref name=FTObit>{{cite news|title=MJ Long, architect, 1939-2018|author=Edwin Heathcote|url=https://www.ft.com/content/16b370a2-bc09-11e8-8274-55b72926558f|publisher=Financial Times|accessdate=18 October 2018|date=21 September 2018}}</ref>