Things you can learn from this map of the ten largest U.S. cities since 1790:
- New York City has always been the largest U.S. city (at least since 1790.)
- Northern Liberties, Pennsylvania (now a neighborhood of Philadelphia and home to the National Shrine of St. John Neumann) was once the 6th largest city in the United States.
- An unforeseen event really shook things up for San Francisco in the early 1900’s.
- Equipped with air conditioning, Americans have grown increasingly fond of warm, dry, sunny weather.