The square was named after Ioannis Kapodistrias, the first governor of modern Greece. His marble statue was placed on the square in 1932.

It owes its name to the five cannons that defended Nafplio in the west in combination with Bourtzi and was constructed by Venetians in the late 15th century.

A monumental bronze statue of Theodoros Kolokotronis on horseback (hero in the greek Independence War) dominates the park. It was created in 1894. A similar statue is found in Athens in front of the Old Parliament building.

Transfiguration of the Saviour.
It is known as Francoklisia and was given to the Catholic Church in 1839. Inside there is a painting of the Sagrada Familia (Holy Family), copy of the work of the Italian Renaissance painter Raphael. It is used since 1839 to present day without interruption.