314 Emperor Constantine became Great by defeating his rival. Big Connie moved to Byzantium to consolidate this victory. We have been there and saw lots of images of the big guy. The city on the Bosphorus became known as Constantinople for the next two millennia, though it was never officially so named.
1840 An Hawaiian constitution was declared in Honolulu. Been there (often, but not often enough). It was done to show the British that Hawaii could govern itself and to lure investment from the United States.
1873 O’Leary’s cow got blamed for the Great Chicago Fire. Who spoke for the cow? Not Elsie. The fire burned for three days in wooden Chicago, killing at least 200 people, and it consumed Abraham Lincoln’s hand written copy of the Emancipation Proclamation which had been on display along with other Lincoln memorabilia.
1897 Franz Jospeh I named Gustav Mahler director of the Vienna Court Opera. The appointment was bold because of the toxic anti-semitism of Vienna. In fact, the position made Mahler a target for the venom.
1956 Don Larson. That is all that needs to be said to a baseball fan. The journeyman Larson reached a pinnacle that no one had done before that day and which no one else has done since. He pitched a perfect game in the World Series. It remains a unique achievement. I watched on television with my dad.