My research  in theoretical syntax is informed by the tradition of generative grammar pioneered by Noam Chomsky in the late fifties, which assumes the existence of an innate language faculty distinct from (but interfacing with) other cognitive systems. Its most recent incarnation, the Minimalist Program, takes this innate language faculty to be an optimal solution to the constraints imposed on it by the cognitive systems with which it interacts. The impact of my research in this minimalist enterprise is threefold. First, my research on symmetry in syntax contributes to our understanding of the nature of three basic syntactic mechanisms underlying the combinatorial properties of language: Merge, Move and Labeling. Second, my research contributes to our understanding of what we might call non-canonical wh-constructions: across-the-board wh-questions (What did Peter write and Bill review?), questions with coordinated wh-pronouns (What and where did John sing?), multiple wh-questions (Where did John sing what?) and various types of relative clauses. And third, my research on Polish contributes to our understanding of the syntax of Slavic languages and, more generally, to our understanding of which aspects of language are universal and which ones are subject to crosslinguistic variation.