This is a book about objects. Stones, ruins, bones, mummies, mannequins, statues, photographs, fakes, instruments, and natural history specimens all formed part of Mexico’s National Museum complex at different moments across two centuries of collecting and display. Museum Matters traces the emergence, consolidation, and dispersal of this national museum complex by telling the stories of its objects. Objects that have been separated over time are brought back together in this book in order to shed light on the interactions and processes that have forged things into symbols of science, aesthetics, and politics. The contributors to this volume illuminate how collections came into being or ceased to exist over time, or how objects moved in and out of collections and museum spaces. They explore what it means to move things physically and spatially, as well as conceptually and symbolically. Museum Matters unravels the concept of the national museum. By unmaking the spaces, frameworks, and structures that form the complicated landscape of national museums, this volume brings a new way to understand the storage, displays, and claims about the Mexican nation’s collections today. Contributors: Miruna Achim, Christina Bueno, Laura Cházaro, Susan Deans-Smith, Frida Gorbach, Haydeé López Hernández, Carlos Mondragón, Bertina Olmedo Vera, Sandra Rozental, Mario Rufer.