SIURELL executed the structures, which had many walls (48,000 m2 between straight formwork, curved, one-sided, climbed, with buttresses, organic ...) and slabs (45,000m2, with free heights of up to 25m and important overhangs that required falsework-59,000 m3- and special formwork. The large organic walls, full of irregular shaped windows, up to 25m high, stand out. It was the work of the prestigious architect Toyo Ito.