The theory of prosodic hierarchy, proposed and developed by a series of work by Elisabeth O. Selkirk, has been one of the most important areas of research in the past few decades. The current volume puts together papers that address issues surrounding the theory of prosodic hierarchy, from its bottom (mora) to the top (utterance). The topics addressed in this volume include, but are not limited to, prosodically-defined phonological processes, phonetics-phonology interface, syntax-phonology interface, semantic-prosody interface, the nature of phonological grammar, and the origins of phonological patterns. Evidence is drawn from languages as diverse as Arabic, Berber, Chadic, Dutch, English, French, German, Japanese, Korean, and Russian. All contributors are colleagues, or former students/collaborators of Elisabeth O. Selkirk. The volume will be of interest to all linguists working on all areas of linguistics, as well as to advanced undergraduate students and graduate students.