This collection is an important contribution to the semantic and syntactic analysis of the expression of existence. The volume focuses on the three main linguistic constructions expressing existence: copular clauses, existential sentences, and (in)definiteness. The papers analyze the interaction between the basic notion of existence and pervasive phenomena of natural language, such as quantification and presupposition. The contributions represent state of the art research on theoretical and comparative issues related to the expression of existence, and make extensive reference to the semantic and syntactic facts of English and of various other languages. The richness of new data and the juxtaposition of different theoretical stances bring a number of new questions into focus.