The krene, with a capacity of 350m3, constitutes the largest and one of the most important examples of public fountain houses in Greece. It forms the end of a water collection system leading water into the city. According to Pausanias (Ι, 40, 1), it was built by the tyrant Theagenes (6th c. B.C.E.), but recent research dates the fountain house to the first quarter of the 5th century B.C.E.

The clock is in the form of a large klepsydra. It consists of two vertical tubes and a waterproof concave base, connected to a hydraulic siphon.

Heron's Aeolοpile exploits the pressure of vapor, converting it into motive rotary force. The steam produced in the boiler is directed through pipes into the sphere and is then  ejected under pressure through two nozzles in opposite directions, causing the sphere to spin. It is considered a precursor of the steam engine; only a simple chain-belt should be added, in order to transfer the rotary motion to a pump. 

This automaton combines two mechanisms, separately, described by Philo from Byzantium and Heron from Alexandria. It functions in two stages:

The Antikythera Mechanism was an analog computer of astonishing technical capacity. It was constructed 2,000 years ago and could accurately calculate the position of the sun, the moon and possibly the planets in the sky. It calculated the phases of the moon, predicted eclipses of the sun and the moon and determined the dates on which the ancient Olympic and the other “Crown” games (called “Stefanites”) were held. On its covering plates and on its interior front and rear surfaces it bore astronomical, geographical and technical inscriptions, all written in Greek characters. The height of most of the letters is between 1.5 and 2.5 mm. Thanks to innovative investigative techniques these texts, lost for more than 2,000 years, have now been read (about 3,400 letters).

The best known ancient Greek oared warship that ruled over Eastern Mediterranean for many centuries. Fast and flexible, with a ram (embolon) fitted on the prow, it attacked successfully the enemy vessels.

Aristotle attributes scenography to Sophocles. Using perspective drawing, lines drawn on the stage sets merged with actual elements of the stage building to create the illusion of real buildings.

The catapult is a military weapon capable of launching large arrows or javelines or spherical stones at great distances (around 200 m). The strong chord of a powerful bow set horizontally was pulled back mechanically (with a system of levers and cranks).  Bending and axial energy was thus accummulated, and when set free it launched the projectile. This technical invention took place at the time of the Tyrrant of Syracuse, Dionysios the Elder (399 B.C.).