The main building on this campus was J. Pierpont Morgan’s private house, and included an incredible private library, complete with mezzanines and bookshelves that turn to reveal hidden, spiral staircases. The architectural detail of this property, alone, makes it worth a visit. The displayed collection currently includes a Gutenberg Bible, an original manuscript by Mozart, and a painting by Leonardo Da Vinci’s teacher. J.P. Morgan was also an avid collector of cylinder seals from the ancient world (little spools of lapis lazuli, obsidian, or other hard materials, that were carved with a unique image and pressed into hot wax in order to verify the authenticity of a document or packaged good). Morgan became something of an expert on these, and many items from his collection are displayed. Fascinating stuff.