The famous Roman baths of Agios Thomas, 19th century, are located about 2km away from the town of
Messolonghi and just 60m north from the intersection of the highway Antirio – Agrinio. The British military officer and topographer William Martin Leake, was an avid collector, especially of Greek and Roman coins, and possessed a great knowledge of Greek and Roman geographical literature. In fact, he describes the place of the thermae as the “middle distance between Messolonghi and Calydon”.

   It is assumed that the baths were built during the 2nd century AD and were destroyed by the powerful earthquake that took place around 551 AD, which struck the entire northwestern Peloponnese and Aetolia. The area was afterwards used as a Christian cemetery.

   This space is in fact a large public complex of Roman thermae (baths), whose walls are preserved to a maximum height of 7m. In the top view it has a T-shape and consists of three clearly distinct areas, a large rectangular tank in the eastern part for the cold bath, a central space with four built-round bathtubs for the warm bath and finally a series of small rooms of various shapes in the western part of it, in the shape of bathtubs for the hot bath.