Hahn/Cock was 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 was displayed on the vacant fourth plinth. The fibreglass work stood 4.72 metres (15.5 ft) high and was the sixth work to be displayed on the plinth, on which it stayed until 17th February 2015.