This book is a major global history of ornament from the Middle Ages to today. Crossing historical and geographical boundaries in unprecedented ways and considering the role of ornament in both art and architecture, Histories of Ornament offers a nuanced examination that integrates medieval, Renaissance, baroque, and modern Euroamerican traditions with their Islamic, Indian, Chinese, and Mesoamerican counterparts. At a time when ornament has re-emerged in architectural practice and is a topic of growing interest to art and architectural historians, the book reveals how the long history of ornament illuminates its global resurgence today. Organized by thematic sections on the significance, influence, and role of ornament, the book addresses ornament's current revival in architecture, its historiography and theories, its transcontinental mobility in medieval and early modern Europe and the Middle East, and its place in the context of industrialization and modernism. Throughout, Histories of Ornament emphasizes the portability and politics of ornament, figuration versus abstraction, cross-cultural dialogues, and the constant negotiation of local and global traditions.