In this milestone work, William Fowler uses archaeology, history, and social theory to show that the establishment of cities was essential to Spanish colonialism. Fowler draws upon decades of archaeological research on the landscape, built environment, and architecture of Ciudad Vieja, a sixteenth-century site located in present-day El Salvador and the best-preserved Spanish colonial city in Latin America.Fowler compares Ciudad Vieja to other urban sites in the region and to the tradition of urbanism in early modern Spain to determine how the Spanish grid-plan layout was modified and implemented in the Americas. Using extensive archival material, Fowler describes how this layout reflected and perpetuated power structures that benefitted the Spanish although the city's Indigenous population was greater in number. Fowler analyzes recorded interactions between colonists, Indigenous peoples, and enslaved Africans to demonstrate the ways the cityscape affected the relationships among individuals and cultural groups. Offering an unparalleled view into a critical moment in Latin American history, this book offers new ways of looking at urbanism and colonialism as intertwined forces in the emergence of the early modern world.