Following a five-week construction process the Serpentine Gallery Pavilion designed by Herzog & de Meuron and Ai Weiwei was opened to the public 1st June 2012. It is the twelfth commission in the Gallery’s annual series. This year’s Pavilion takes visitors beneath the Serpentine’s lawn to explore the hidden history of its previous Pavilions. Eleven columns characterising each past Pavilion and a twelfth column representing the current structure support a floating platform roof 1.4 metres above ground. The Pavilion’s interior is clad in cork. Taking an archaeological approach, Herzog & de Meuron have created a design that inspires visitors to look beneath the surface of the park as well as back in time across the traces of the earlier structures.