In 1837, entrepreneur and philanthropist Johns Hopkins bought a Federal-style mansion located on 300 acres in northeast Baltimore. Henry Thompson, a businessman and War of 1812 cavalry captain, had built the estate in 1803 and named it Clifton after his ancestral home in England. It became Hopkins’ summer home, where he liked to entertain family and friends, until his death in 1873. It’s where he welcomed the Prince of Wales, who became King Edward VII. It’s where he held a clandestine meeting that included Salmon Chase, secretary of the Treasury under President Abraham Lincoln; his friend John Work Garrett, the B&O Railroad president; and other B&O officials, who offered to use the rail for Union Army troop movements. And it’s where he hoped the university that would bear his name would be located