Duarte de Armas’ Livro das fortalezas or Book of Fortresses illustrates 55
border fortresses in over 180 meticulous measured and annotated renderings.
The book is even more impressive given that de Armas completed his on-site
survey in a single year (1509) and finished annotating the book the following
year. The book’s drawings, alluring in their combination of finite time and
enormous space, are difficult to link together at an intra-site or inter-site scale.
Consequently, while mapping the 55 border fortresses in the book provides a
greater apprehension of a historical, liminal space, this alone does not solve
the greater problem of reconstructing de Armas’ methods for rendering place
on the Portuguese-Castilian border, nor does it acknowledge the historical
moment in which it was produced. This article reconstructs the world of the
Book of Fortresses through a novel, digital approach that acknowledges Duarte
de Armas’ malleable sense of space rather than ‘rectifying’ his work to match
modern geography.