Swan chair is a chair and a couch designed by Arne Jacobsen in 1958 for Radisson SAS Royal Hotel in Copenhagen. It is manufactured by Danish furniture manufacturer Republic of Fritz Hansen.
Along with the swan Jacobsen also developed the Egg chair and further furniture which mostly did not get into mass production, like the Drop. The couch of the swan is still in production. 
Jacobsen did not only use the swan for the SAS Royal Hotel, he also used it on his following projects like Danmarks Nationalbank.
The Swan has been in production at Fritz Hansen ever since. It is available in several types of leather and fabric upholstery. The base is always star shaped in satin polished aluminium.