The Trowbridge Reading Room at Yale Divinity Library is devoted to reference materials for the history of Christianity (and other) studies.
Located on the second (upper) floor. Trowbridge holds reference books for all studies, including early modern Christian history. Librarians have chosen for this room select dictionaries, handbooks, companions, and other books that they have found especially helpful for students.
It's a one-stop shop. Scan these shelves to find choice reference materials quickly. For resources on the early modern era, begin with the call number BR.280.