In 2005, a small Costa Coffee café, designed by Marks Barfield Architects and dubbed the Spiral Café, was constructed alongside the steps leading towards to New Street from St Martin's Square. The building's shape resembled that of shell and featured a curved bronze roof with both ends covered with glass. The main contractors were Thomas Vale and the structural engineers were Price & Myers. The building form is inspired by the mathematician Leonardo Fibonacci who identified natural patterns of growth found throughout the universe, from the shapes of shells and pines cones to fractal patterns within galaxies. The café was knocked down as part of the Spiceal Street redevelopment in 2011.