Like its Berlin location, the Cologne branch of Walther-König has an impressive selection of art and architecture books but is well-stocked in other genres as well. Unique to this location, however, is the postcard collection, with the widest selection of 6 x 4.25 inch, cardstock stationary in the country (over 50,000 designs, from modern photography to cave-painting).
Ehrenstraße 4, Cologne, Germany