The tourist information for my hometown of Lancaster, Pennsylvania, likes to brag that the city was “Capital of the United States for one day: September 27, 1777.” Continental Congress was forced to flee Philadelphia, you see, and briefly met in Lancaster before deciding that York, on the other side of the Susquehanna River, was safer.
Kingston, Tennessee, was state capital for one day, for reasons not entirely clear to me.
Are there any other cities and towns that have a real claim to being capital of a political entity for a single day?