Spain has been remarkably hospitable to foreign architects, as city after city strives to replicate the so-called Bilbao effect, which has attracted millions of visitors to the northern Basque port. Cadiz has Herzog & de Meuron, Córdoba has Rem Koolhaas, Durango has Zaha Hadid, and Valencia has Foster & Partners. One of the most ambitious of the signature projects is a piece of urban infrastructure designed for Seville by Berlin-based architect Jürgen Mayer H. (at right). The six giant connected umbrellas will stand in a medieval square, below which stands a museum and Roman ruins. The mammoth gridded canopy contains a restaurant and roof terraces. The ominous forms, which have none of the whimsy of the Santa Caterina market, recall the AT-AT walkers in The Empire Strikes Back. Whether these cold monoliths will become a tourist attraction remains to be seen.