These four designs recognize the 200th anniversary of the first circus performance in the United States. The first circus performance was April 3, 1793, in Philadelphia, then capital of the United States. At the ceremonies where the stamp was formally issued, perhaps the world's largest "postal employee" "canceled" a replica of the stamp. King Tusk, a 7.5-ton elephant and the largest land mammal traveling the world today, canceled a giant replica of the four stamps with his footprint. At that inaugural circus performance in Philadelphia, the program was billed as "an equestrian performance" and consisted of a troupe of riders, acrobats, a clown, and a few musicians. It was performed in a circular area -- a ring -- surrounded by a temporary structure of low wood fencing that was a called "a circus," after the arenas of ancient Rome.