The Caelian Hill is a big hill in the city of Rome. It's one of seven hills that are very important to the history of Rome. People have lived on the Caelian Hill for a very long time, from before the time of the ancient Romans to today. There are many old buildings and important sites on the hill, like the Baths of Caracalla and the church of St. John Lateran. The Caelian Hill is a special place with lots of history and interesting things to see.