Six artists have produced models of their proposed work which went on display at St Martin in the Fields church, Trafalgar Square.
Works by Allora & Calzadilla, Elmgreen & Dragset, Katharina Fritsch, Brian Griffiths, Hew Locke and Mariele Neudecker can be viewed free of charge at the church until 31 October.
The public can leave comments on the proposals at the exhibition or online at www.fourthplinth.co.uk
Allora & Calzadilla have presented a working ATM cash dispenser, which they plan to embed into the fourth plinth. When accessed it will trigger a working pipe organ on top of the plinth which will resonate through the square.
Ben Griffith’s Battenberg has been designed to commemorate the marriage of Queen Victoria’s grand-daughter, Princess Victoria of Hesse, to Prince Louis of Battenberg in 1844.
Hew Locke has chosen to recreate the Portland Place equestrian statue of Field Marshal Sir George White as a fetish object.
Arts Council England supports the Fourth Plinth Programme which is funded by the Mayor of London Boris Johnson, who will announce the winning design early next year.
The incumbent design – Nelson Ship In A Bottle by Yinka Shonibare MBE – will be taken down at the end of 2011 and replaced with the new design.