Ohio is home to the only non-rectangular state flag in the United States. It was designed in 1901 by Cleveland architect John Eisenmann for Ohio's display at the Pan-American Exposition held in Buffalo, NY. The flag, which is actually a burgee, was officially adopted by the Ohio legislature in May of 1902. Eisenmann modeled the state flag after Civil War cavalry flags. Every segment of the flag was designed to be symbolic of Ohio, including the number of stars, the dual circles in the midst of those stars, as well as the triangles and stripes. On any given day, you'll find several Ohio flags flying proudly on Capitol Square.