Reubin Seifert (25 November 1910 – 26 October 2001) - normally known as Richard Seifert was a British architect, best known for designing the Centrepoint tower and Tower 42 (previously the NatWest Tower), once the tallest building in the City of London. Seifert is widely recognised for having influenced and shaped 1960s and 1970s London architecture in much the same way as Richard Rogers and Norman Foster would do in the 1980s and beyond. Other examples of his work in London include Euston Station, Drapers Gardens and the King's Reach Tower, as well as numerous commercial buildings - principally hotels and office blocks - in and around London. His practice also designed commercial buildings and social housing developments in other major British cities - most notably Birmingham, Manchester and Glasgow.
Following his retirement in 1984, his son John Seifert took over the practice, which survived in various forms until 2010 when it closed amid alleged failure to pay tax debts. John Seifert now practices under the name Sigma Architects - continuing the legacy of hotel and commercial developments begun by his father.