As the first major building completed when the Johns Hopkins University moved in the early 1900s from downtown to its north Baltimore location, Gilman Hall was both the literal and figurative heart of campus. Distinguished by a massive bell tower and portico, visible from many directions, it was the place where students and faculty spent most of their time. But after 92 years and numerous campus additions, that heart has grown weak. This summer, Hopkins will embark on a three-year, $73 million restoration and modernization that promises to breathe new life into this academic landmark.