An influential strand of European architecture is characterised by a strong undercurrent of rationalist thought. This has emerged diversely in different countries, contributing to an impressive body of projects that remain principally concerned with rational order and hierarchy as a design premise. This title brings together outstanding architectural work, which demonstrates different approaches towards rationality in architecture; revealing traces of inter-war rationalism and post-war Neo-rationalism (of the 1960s and 70s) evident in individual projects. These may be found in patterns of thinking, a particular formal repertoire forms or consistency, or simply in the singularity of particular buildings, constituting different types of architectures of Rationalism.