The Tower of Stavronikitas, also known as the Tower of Sani was built to protect the “metochi” (dependency) of the Stavronikita Monastery. The tower is in an excellent state of repair; it is 8 meters high, but the archaeologists believe that an upper floor is missing, and the original tower was much taller.

The Tower of Agios Georgios also called Stavronikita, or Sani Tower is located on an elevated position where historians assume the former area of the ancient Sani’s acropolis stood. The historic city was built by settlers from Eretria and was said to be one of the most prosperous coastal cities of Halkidiki until the rise of the Roman era.
According to records found in the monastery, this whole area went by the name
'Pyrgos (gr. ‘tower’) as was mentioned in 1346 on an official document written by
the Serbian King Stefan Susan.

The Stavronikita Tower was probably built as a consequence of the looting of
Kassandra by Catalan mercenaries in 1307-1309. At that time the tower was called Agios Georgios and it was surrounded by a small village of monks. It was used to protect the Metochi Pinakas of the Mount Athos Monastery of Stavronikita, which had been purchased in 1543 by Patriarch Jeremiah I on behalf of the monastery. The monk’s village was located 1km from the coast to prevent pirate attacks.