Buildings opened

.

• January – Embassy of the United States, Baghdad, the largest and most expensive embassy in the world, opens.
• January 17 – Copenhagen Concert Hall, designed by Jean Nouvel, opens.

opens.

• January 22 – Wales Millennium Centre, Cardiff, Wales, opens to the public.
• January 31 – Porsche Museum, Stuttgart, designed by Delugan Meissl Associated Architects, opens.
• February 15 – Princess Elisabeth Antarctica, inaugurated.
• February 22 – Alice Tully Hall at Lincoln Center in New York City reopens after major renovations by Diller Scofidio + Renfro.
• March 7 – Our Lady of the Most Holy Trinity Chapel at Thomas Aquinas College, Santa Paula, California, designed by Duncan G. Stroik, is dedicated.
• March 14 – New Cardiff Central Library in St. David's, Cardiff, Wales, designed by Building Design Partnership, opens to the public.
• April 2 – New Yankee Stadium, home of the New York Yankees baseball team in the Bronx, designed by Populous (formerly HOK Sport), opens.
• April 13 – Citi Field, new home of the New York Mets baseball team in Queens, opens.
• April 25 – Prada Transformer building in Seoul, South Korea, designed by Rem Koolhaas, opens.
• April 30 – 300 New Jersey Avenue office building on the mall in Washington, D.C., designed by British architects Rogers Stirk Harbour + Partners, opens.

• May 21 – Museum Brandhorst in Munich, designed by Sauerbruch Hutton, opens.
• June 8 – First segment of the High Line Park in Chelsea, Manhattan opens.
• June 12 – Hafod Eryri at the summit of Snowdon in Wales, designed by Ray Hole Architects, is opened.^[1]
• June 21 – New Acropolis Museum in Athens, designed by Bernard Tschumi with Michael Photiadis, opens to the public.
• July – New Sarawak State Legislative Assembly Building in Kuching, Malaysia, officially opened.
• August 4 – The Knut Hamsun Centre in Hamarøy, Norway, designed by Steven Holl, opens.
• August 15 – 41 Cooper Square, the new Cooper Union academic building in New York City, designed by Thom Mayne, has its opening ceremony.
• September 9 – Herning Museum of Contemporary Art, Denmark, new building designed by American architect Steven Holl, opens.

• September 18 – Liège-Guillemins railway station in Belgium, designed by Santiago Calatrava, has its opening ceremony.
• September 29 – Manitoba Hydro Place in downtown Winnipeg, designed by Kuwabara Payne McKenna Blumberg Architects of Toronto, opens.
• October 16 – Extensive interior reconstruction of the Neues Museum, Berlin, to the designs of David Chipperfield, is officially opened.
• November 7 – Extensive three-year internal rebuild and expansion of the Ashmolean Museum, Oxford, to the designs of Rick Mather, is completed.
• November 14 – Centre for Contemporary Art Nottingham (gallery) in Nottingham, England, designed by Caruso St John, opens.
• December – Jamieson Place (Calgary) in Calgary, Alberta
• December 5 – Mandarin Oriental, Las Vegas, part of the CityCenter complex in Paradise, Nevada, opens.
• December 16 – The CityCenter urban complex in Paradise, Nevada, designed by Ehrenkrantz, Eckstut & Kuhn Architects, opens.
• date unknown – Jacob und Wilhelm Grimm-Zentrum library at Humboldt University of Berlin, designed by Max Dudler.

Buildings completed

• May 21 – Stanbrook Abbey, Wass, North Yorkshire, England, first stage, designed by Feilden Clegg Bradley Studios.^[2]
• May 27 – Cowboys Stadium, new home of the Dallas Cowboys football team, designed by HKS.
• October 21 – Soccer City (FNB Stadium) in Johannesburg, South Africa, host to the 2010 FIFA World Cup.
• November – MAXXI - National Museum of the 21st Century Arts in Rome, Italy, designed by Zaha Hadid.
• November 1 – Yas Hotel Abu Dhabi in the Yas Marina Circuit, Abu Dhabi, designed by Asymptote Architecture of New York.
• December 27 – Darunaman Mosque in northern Thailand.
• date unknown
  • The Cathedral of the Annunciation in Voronezh, Russia.
  • Legacy Tower, Chicago, designed by Solomon, Cordwell, Buenz.
  • The Tower, Meridian Quay, Swansea, Wales, designed by Latitude Architects.
  • Punta della Dogana art museum in Venice, restored by Tadao Ando.
  • Woodward's Building in Vancouver, Canada.
  • Bateman's Row (home and studio) in Shoreditch, London, designed for themselves by Theis + Khan Architects.^[3]
  • Buildings in Spain designed by Alberto Campo Baeza
    • "Between Cathedrals", Cádiz.
    • MA Museum, Granada.
    • Rufo House, Toledo.