In Leonidio are important pre-revolutionary residences, in the form of tower-houses.
The Tower of Onoufrios Skarmpounis (known as the Tower of Noufris) consisted of three levels and a roof terrace; it had a rectangular ground-plan. The entrance to the tower was on the first floor. The ground-floor was covered by an arch and communicated with the first floor by a built stairway. The second floor was also roofed by an arch, and separated from the first by a wooden floor. Both floors communicated by means of movable ladders. The tower was reinforced with defensive gun-loops as well as two machicolations, one of which protected the entrance. Both the first and second floor had windows, and both floors were equipped with fireplaces.
The Chatziroudi Tower is another important one at Leonidio. It has a rectangular floor plan and is divided into four levels (ground floor, two floors and a roof terrace). The floors have small windows, while its fortified character is bolstered by gun-loops and two machicolations. It dates to the 18th century.
Another house with a defensive character, and L-shaped in plan is the Katsikogianni house, which according to legend was built in 1807.
One of the most remarkable examples of a fortified residence is the Tsikalioti Tower. It consists of three levels; and is also of L-shaped plan. A rough-stone wall encloses the south-east corner where a small circular tower stands: in its yard-space there were additional outbuildings. The defensive features it has (turret, gun-loops) notwithstanding, the Tsikalioti tower is characterized by comfort and luxury, evident in the rooms by the painted decoration, carved wooden ceilings and the decorative elements in generally. It was built in 1808 by the wholesaler and ship-owner Constantinos Tsikalioti: a member of the Friendly Society (Filiki Etaireia) he donated a lot of money to the Struggle against the Turks. Influenced by his trips made to various countries, he introduced a number of architectural and decorative elements to his tower-house.
The Polytimos Tower has a rectangular floor-plan and is built on two levels. The ground floor houses utility rooms, while the first floor has the accommodation facilities. This mansion also features intricate architectural details (the arched lintel of the entrance at the first floor, the moulded stone cornice). The openings in the walls are relatively large, while the fortified character is evident in the gun-loops. It was built in 1816.