In 1990, Potsdam with its inimitable landscape dominated by cultural highlights such as palaces and parks was entered in the World Natural and Cultural Heritage list. For more than 200 years, this city was the royal residence of the Prussian kings, who called the most prestigious artists and architects to their courts. Landmark works of art of the Baroque, Rococo, Classicist, and Grunderzeit eras bear witness to this seminal phase of artistic production. 24 motifs of castles and sights are each depicted on two cards. Whoever turns up two identical motifs may put them on his or her pile of cards.