Expo 2015 represented a major challenge for Milan and Italy. Built around the theme “Feeding the Planet, Energy for Life,” it combined local and global traditions, innovation, and technology, while establishing diplomatic and trade relations with many countries from around the world. The conclusion of a long process that had lasted about nine years, Expo 2015 was marked by difficulties in its governance and by delays in the implementation of its projects and works. After a brief review of this process, the chapter focuses on the events of 2015, the final race for the completion of works, and the event itself. It then discusses the theme that was chosen, including its representation by the various pavilions set up by the 158 participating countries. The final section discusses the outcome of Expo 2015 in terms of its legacy—the Milan Charter—and the economic opportunity for future development that the site presents.