1) High-tech architecture 
Weltstadthaus is the name of several Peek & Cloppenburg stores: ...[Cologne] The Weltstadthaus (`global city building`), housing a department store in Cologne, Germany, was designed by Renzo Piano and completed in 2005, following a lengthy legal battle concerning the structural engineering of the core building. It covers up a main traffic artery, the Nord-Süd-Fahrt, and faces Europe`s most frequented shop...