The new shopping facilities are located under the largest green roof in Italy. Apart from major planning benefits, this has driven a major passive energy strategy. Rainwater run-off is managed and recycled via a well system. The thermal mass of the roof reduces both heating and cooling loads internally and natural lighting is provided by a series of light cannons orientated north to manage solar gain and glare. The roof rises away from the entrance towards the major tenants, creating a lofty interior, enlivened by patterns of dappled light.