Only a complex structural system could fulfil the requirements emerging from the proximity of the Danube and the given construction site. On that reason, Fővám tér station is composed of a cut-and- cover box and tunnels. The box is supported by three levels of reinforced concrete beams, the structure of which are similar to a net. There are three layers of this network, which keep the walls of the box like a bone-structure. The design of the box is determined by this sight of concrete net- structure. In the other part the tunnels have a curved cross section. The walls and the columns will be covered with mosaic tiles.