The Bromo Seltzer Tower has been a Baltimore landmark since its construction in 1911 and was the tallest building in Baltimore at the time. This historic structure, listed on the National Register of Historic Places, was modeled after the Palazzo Vecchio in Florence, Italy. The tower was designed by Joseph Evans Sperry and built by Captain Isaac Emerson, the inventor of the headache remedy Bromo Seltzer. The most interesting feature is the still-functioning tower clock, the face of which displays the word BROMO-SELTZER instead of numbers.