What is Beijing National Stadium?
{{Infobox stadium | name = National Stadium | nickname = Bird's Nest | logo_image = | image = [[File:Beijing national stadium.jpg|250px]] | fullname = National Stadium | location = [[Beijing, China]] | coordinates = | broke_ground = 24 December 2003 | opened = 28 June 2008 | expanded = | closed = | demolished = | owner = | operator = | surface = [[Grass]] | construction_cost = US$423&nbsp;million<ref name=AR93>{{Cite journal |last=Pasternack |first=Alex |others=Clifford A. Pearson |year=2008 |title=National Stadium |journal=[[Architectural Record]] |pages=92–9 |url=http://archrecord.construction.com/projects/portfolio/archives/0807nationalstadium-1.asp |accessdate=27 August 2008 |url-status=live |archive-date=28 August 2008 |archive-url=https://web.archive.org/web/20080828222005/http://archrecord.construction.com/projects/portfolio/archives/0807nationalstadium-1.asp}}</ref>{{rp|93|}}<br>(${{formatprice|{{Inflation|US|423000000|2008}}}} in {{CURRENTYEAR}} dollars{{inflation-fn|US|df=yes}}) | architect = [[Herzog & de Meuron]]<br>ArupSport<br>China Architectural Design & Research Group<br>[[Ai Weiwei]] <small>(Artistic consultant)</small> | structural engineer = [[Arup]] | services engineer = | general_contractor = | project_manager = | main_contractors = | former_names = | tenants = [[2008 Summer Olympics]]<br>[[2022 Winter Olympics]]<br>[[Supercoppa Italiana]] ([[2009 Supercoppa Italiana|2009]], [[2011 Supercoppa Italiana|2011]]–[[2012 Supercoppa Italiana|12]])<br>[[2015 World Championships in Athletics]] | acreage = | capacity = 80,000<br>91,000 (2008 Summer Olympics)<br>45,550 (2022 Winter Olympics)<br> <ref name=Arup>{{cite web|url= http://www.arup.com/eastasia/project.cfm?pageid=2184|title= Beijing National Stadium, Olympic Green|accessdate= 28 August 2008|work= East Asia|publisher= [[Arup]]