Opposite the Acropolis, you'll find the Filopappou Monument, originally known as the Hill of the Muses. It's named after Julius Antiochos Philopappos, a benefactor of Athens in the 1st century AD. Unfortunately, only the northeast side of the Filopappou Mausoleum remains today, featuring an artistic relief depicting a key moment in Philopappos's life. Constructed between 114 and 116 AD, the monument's complex architecture suggests a grand purpose. In 1821, during the revolution, the hill served as an artillery position. Today, it's a popular spot for leisurely walks and kite flying on Clean Monday, offering spectacular panoramic views of the city. The remnants of a wall planned after the Battle of Chaeronea in 338 BC to defend against the advancing Macedonians can still be seen. Access to the monument is available from the Filopappou Ring Road, with the primary entrance located at the end of Apostolou Pavlou, opposite the Acropolis.