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 was displayed on the vacant fourth plinth. The fibreglass work stood 4.72 metres high and was the sixth work to be displayed on the plinth, on which it stayed until 17 February 2015. It was subsequently acquired by Glenstone, a private museum, and exhibited at the National Gallery of Art in Washington, DC, following its 2016 reopening.
The work is in an edition of two. The second version is in the sculpture garden of the Walker Art Center in Minneapolis, MN on a pedestal designed by the artist.