Expoenergie srl has started work on Greenbuilding, the international exhibition and conference on energy efficiency and sustainable architecture, to be held at the Verona Exhibition Centre, Italy, on 4 – 6 May 2011. Greenbuilding will be held alongside Solarexpo, the international exhibition and conference on renewable energy and distributed generation. Greenbuilding and Solarexpo together form Italy's leading event dedicated to renewable energy and sustainable architecture. The 2010 event saw 1,268 exhibitors across a total of 105,000 m2 floor space plus 54 conferences, workshops, courses and seminars with 415 national and international speakers and 5,320 registered attendees.