The city was a primary theater of Baroque rhetorical projection. At once political, anagogical, and aesthetic, from its built form to the ephemeral structures and processions that animated it, the Baroque city was shaped into a theatrical space. The city was also a microcosm, a world in miniature. Political means were directed toward the representation of civic harmony, the concordance of the civic and the celestial, and the mirror of Justice; beauty was not only an aesthetic experience, it was a sign of a harmonious society. This chapter focuses on several cities that are representative of some critical aspects of Baroque urbanism. Beginning in Rome, where many of the techniques of Baroque urban design were generated, it tracks their propagation to Paris and across France, to Germany, and finally to Amsterdam. The picture that emerges depicts those characteristics of the Baroque city that made it both unique and influential.