For more than 500 years, the Portuguese built or adapted fortifications along the coasts of Africa, Asia and South America. At a macro scale, mapping this network of power reveals a gigantic territorial and colonial project. Forts articulated the colonial and the metropolitan, and functioned as nodes in a mercantile empire, shaping early forms of capitalism, transforming the global political economy, and generating a flood of images and ideas on an unprecedented scale. Today, they can be understood as active material legacies of empire that represent promises, dangers and possibilities. Forts...