Defining the geographical space of linguistic variation and drawing the areal distribution of linguistic variants are classical issues in dialectology. Over recent decades, advances in geolinguistic methods, along with new trends in the study of linguistic variation, have significantly shaped new ways of approaching limits and areas in dialectology. This volume is at the crossroads of recent methodological and conceptual developments in dialectology and brings together contributions offering an unusual panorama of case studies from Basque, Romance, Germanic, Celtic, and Slavic languages. The seventeen chapters in this volume address a wide spectrum of issues exploring new approaches to the interplay of dialect areas and time and society (Part I), current quantitative methods of studying dialect limits (Part II), and linguistic geovariation focused on lexical, prosodic, syntactic or morphosyntactic topics (Part III). One of the unique features of the volume is the important collection of contributions addressing issues of dialect syntax, a recent and rapidly growing field of linguistic research.