Construction work on Switzerland's highest building, the Prime Tower in Zurich, has begun with the foundation stone officially laid on Wednesday.
The tower, which will cost SFr355 million ($295.4 million), consists of the 126-metre-high tower itself and two adjacent buildings, Cubus and Diagonal. The complex is due to open in 2011.
Prime Tower has a surface area of 39,500 square metres on 36 floors, which will be rented as offices only.
The property company Swiss Prime Site said that 52 per cent of the space had already been rented out and the tower featured a gourmet restaurant on the 35th floor.
The Prime Tower will only hold the record as Switzerland's tallest building for a year. The Basel pharmaceutical and diagnostics group, Roche, plans to open its 42-floor Roche Tower at 154 metres in 2012.