Plaza de Armas is the central public square in Querétaro. Having a central public square, or squares (as in the case of Querétaro) is perhaps, the defining feature of Spanish colonial urban design. Any and every city, town, village will have its central squares. During colonial times, these were where most businesses happened, both public and private. This isn't true anymore, of course, but the public squares still hold the best and worst of civic life in the cities and towns of Mexico.