Google has a lot of stuff on this, including the following:
Hahn/Cock is a sculpture of a giant blue cockerel by the German artist Katharina Fritsch. It was unveiled in London's Trafalgar Square on 25 July 2013 and is displayed on the vacant fourth plinth.
Hahn/Cock is a sculpture of a giant blue cockerel by the German artist Katharina Fritsch. It was unveiled in London's Trafalgar Square on 25 July 2013 and is displayed on the vacant fourth plinth.