Filopappou Hill or Mouson Hill or Seggio Hill is a hill in Athens located opposite, southwest, from the Acropolis. It is connected to the adjacent hills of Asteroskopeio (hill of Nymphs) and Pnyka. At its top there is the monument of Philopappos which was erected by His Highness Philopappos during the Roman occupation and gave his name to the hill. Around the hill of Filopappou is the district of the same name as well as the districts of Koukaki, Asyrmatos, Petralona and Acropolis. On the south side of the hill there is also the Dora Stratou theater. The oldest name "Segio hill" dates back to the time of the Frankish occupation and was preserved until the beginning of the last century. The etymology of this name apparently comes from the Italian word segno, (segno = signal, signal), perhaps because during the Frankish period there was a kind of signaling station on the southern projection of the top of the hill that received and transmitted signals and information with other observation towers, along coasts and islands of the Saronic, which mainly concerned the appearance of fleets or pirate ships.