Portable Diptych with Compass, Sundial, and Perpetual Calendar 1660 - 1680

Charles Bloud's "Portable Diptych with Compass, Sundial, and Perpetual Calendar" is a small, intricate ivory and brass folding instrument dating from 1660–1680. It is a prime example of 17th-century craftsmanship and the fascination with scientific instruments during the Enlightenment era. Its intricate detailing includes a compass, sundial, and a perpetual calendar, all neatly contained within a compact and portable design. This portable diptych speaks to a growing interest in navigation and the study of celestial bodies, making it a valuable tool for travelers and scholars alike. The Art Institute of Chicago houses this exquisite piece, showcasing the artistry and ingenuity of the era.