Located just opposite the Acropolis, this hill is 147 meters high and its top is dominated by a large monument. In ancient times the hill was known as Hill of Muses or Museum, but today it is named after the name of the man whose tomb lies at the top, Gaius Julius Antiochus Epiphanes Philopappus, or just Philopappus. He was the young Prince of Commagene, a small kingdom in ancient Syria. When the Romans annexed that kingdom, the royal family were welcomed in Rome. Philopappus then made his way to Athens, became a benefactor of the Athenian people and as a reward they granted him the Athenian citizenship. As an exception to the rule, he was buried not in a common cemetery but in an imposing tomb on top of the hill of Muses.