The year 1991 in architecture involved some significant architectural events and new buildings.

Buildings and structures

Buildings

• One Canada Square at Canary Wharf in London, designed by César Pelli & Associates, becomes the tallest building in the United Kingdom.
• Stansted Airport terminal building in Essex, England, designed by Norman Foster.
• Rebuilt Liverpool Street station in London, designed by Nick Derbyshire, is opened.
• The Tianjin Radio and Television Tower in Tianjin, China is completed.
• The Sainsbury Wing of the National Gallery in London, designed by Robert Venturi and Denise Scott Brown, is opened.
• Norwegian Glacier Museum in Fjærland, designed by Sverre Fehn, is built.
• Extended Brentwood Cathedral in England, designed by Quinlan Terry, is dedicated.
• University of Vaasa Palosaari stage 1 buildings, Finland, designed by Käpy and Simo Paavilainen.
• Key Tower in Cleveland, Ohio, United States is completed.
• The Messeturm^[1] in Frankfurt am Main, Germany is completed.^[2]
• QV.1 in Perth, Australia.^[2]
• TD Canada Trust Tower, Calgary in Calgary, Alberta
• Carnegie Hall Tower in Manhattan, New York, United States is completed.
• Bell Atlantic Tower in Philadelphia, Pennsylvania, United States is completed.^[3]
• Bourke Place in Melbourne, Australia is completed.
• Melbourne Central Shopping Centre in Melbourne, Australia is completed.
• The Friedrich Clemens Gerke Tower in Cuxhaven, Lower Saxony, Germany is completed.
• The Guangzhou TV Tower in Guangzhou, China is completed.
• The West Tower of the Stardust Resort & Casino in Las Vegas, Nevada, United States is completed.
• 101 Collins Street designed by architects Denton Corker Marshall is completed in Melbourne.
• "The Corns" residential towers, "1000 Years" housing estate, Katowice, Poland, designed by Henryk Buszko and Aleksander Franta, is completed.

Awards

• AIA Gold Medal – Benjamin C. Thompson.
• Architecture Firm Award – Zimmer Gunsul Frasca Architects.
• Grand Prix de l'urbanisme – Jean Dellus.
• Grand prix national de l'architecture – Christian Hauvette.
• Praemium Imperiale Architecture Laureate – Gae Aulenti.
• Pritzker Prize – Robert Venturi.
• Prix de l'Académie d'Architecture de France – Norman Foster.
• RAIA Gold Medal – Donald Bailey.
• RIBA Royal Gold Medal – Colin Stansfield Smith.
• Twenty-five Year Award – Sea Ranch Condominium One

Births

Deaths

• August 19 – Hans van der Laan, Dutch monk and architect (born 1904)