The eleven selected contributions making up this volume deal with grammatical relations, their coding and behavioral properties, and the change that these properties have undergone in different languages. The focus of this collection is on the changing properties of subjects and objects, although the scope of the volume goes beyond the central problems pertaining to case marking and word order. The diachrony of syntactic and morphosyntactic phenomena are approached from different theoretical perspectives, generative grammar, valency grammar, and functionalism. The languages dealt with include Old English, Mainland Scandinavian, Icelandic, German and other Germanic languages, Latin, French and other Romance languages, Northeast Caucasian, Eskimo, and Popolocan. This book provides an opportunity to compare different theoretical approaches to similar phenomena in different languages and language families.