A climb up Palaiokastro hill and a walk around the Fortezza are definitely worth your while.
The Fortezza is the fortress of a series of fortifications built during Venetian rule, and their construction lasted seven years (1573-1580 AD). Externally, the walls are low but thick, with an incline designed to rebut enemy fire. The fortress's main gateway is on the eastern side. When you cross it, you will be led through a dark gallery into the interior fortress and out again into the light. The first building on your right is the artillery warehouse, currently operating as an exhibition hall.
A hit further on on your left you will see the parapet of Saint Ilias and the small semicircular Erofili Amphitheatre, which is used for renaissance cultural events in the summer. sport ween the two is the prominent mosque of Sultan Ibrahim, and opposite it the remains of the Venetian Rettore's residence. Further down, on your right, is the church of Agia Ekaterini (St Catherine), built at the end
of the I 2th century. If you follow the footpath, you will be led to the semi-basement warehouses of the northern wall, and then on your left the Advisors' residence, which is reminiscent of Renaissance palaces. Another fifty meters along the same path will bring you to the gunpowder warehouse, a small stone building with a pyramidshaped roof.
On the eastern side of the fortress you will encounter the small Russian Orthodox church of Agii Theodori, an indication of the presence of Russian troops here in the period 1897-1909. Continue walking east to complete your tour of the fortress.