To passers-by, it looks as though a section of the historic market building in Covent Garden has broken free from its foundations and is floating unaided, high above them.But in reality, the display, which imitates the architecture in the area, is a complicated piece of technical wizardry which took months to create.The installation, named Take my Lightning but Don't steal my Thunder, was created by the artist Alex Chinneck, who is well known for creating optical illusions.It seems as though the 184-year-old market building has been torn off and is levitating with a large gap between the broken 'stone' walls, pillars and doors.The 12-metre-long sculpture has been made from a steel frame and a type of expanded polystyrene called filcor.  It is understood to have taken 500 hours to paint using special digital techniques and was designed to resemble the existing architecture in the area. The structure itself has been going up since the weekend using cranes, a number of trucks and cherry pickers.(dailymail.co.uk)Bakudaily.Az