It is best known for its design work for the built environment.[8][9] Projects to which it has contributed include the Sydney Opera House, which is largely credited with launching Arup into the premier league of engineering consultancies.[10] The BBC and RIBA documentary The Brits who Built the Modern World highlighted Arup's collaboration with architects and described Arup as "the engineering firm which Lord Norman Foster and his peers Lord Richard Rogers, Sir Nicholas Grimshaw, Sir Michael Hopkins and Sir Terry Farrell most frequently relied upon."[11]