“The Bookman’s Paradise exists,” a writer from the London Times announced in 1908, “and I have seen it. . . . I have entered the most carefully, jealously guarded treasure-house in the world, and nothing in it has been hidden from me.” That “paradise” was J. Pierpont Morgan’s Library, completed in 1906. Designed by the architect Charles McKim and located just a block away from Morgan’s former residence, the Renaissance-style palazzo was envisioned as a treasure trove for rare materials. Today, this lavish haven is home to historical marvels that include Henry VIII’s Golden Gospels, and the Gutenberg Bible, which dates to 1455. This exhibition traces the design, construction, and early life of the library; expect to see rare archival material, manuscripts, and period photographs. McKim died three years after the library’s completion, and it is considered to be his greatest masterpiece. The gardens reopen on June 18, and will stay open until the fall. —Elena Clavarino