Jupiter Lighthouse was designed by George G. Meade, later Federal commander at Gettysburg, and was first lighted on July 10, 1860. It was dark during the War Between the States, when its mechanism was hidden by Southern sympathizers. After being relighted on June 28, 1866, it did not miss a night in over 100 years. Its early keepers were Thomas Twiner, J.F. Papy, Wm. B. Davis, James A. Armour, Joseph A. Wells, Thomas Knight, and Charles Seabrook, and it has been operated by the United States Coast Guard since 1939.