The structural work for the Filadelfie building complex in Prague with its interesting ground plan is very close to completion. With the help of the PERI formwork solution, the 17-floor multi-storey building – constructed in the form of a four-blade propeller – will shortly be finished. The MULTIFLEX slab formwork system , in particular, showed itself to be extremely flexible and adaptable for forming the curved upper and massive basement slabs.