This volume collects 11 papers written between 1991 and 2016, some of them unpublished, which explore various aspects of the architecture of grammar in a minimalist perspective. The phenomena that are brought to bear on the architectural issue come from a range of languages, among them French, European Portuguese, Welsh, German and English, and include clitic placement, expletive pronouns, resumption, causative structures, copulative and existential constructions, VP ellipsis, as well as the distinction between the SVO, VSO and V2 linguistic types. This book sheds a new light on the division of labour between components and paves the way for further research on grammatical architecture.