The most important building of the Roman Agora Site.
It is an octagonal tower, made of Pentelic marble. It has a height of 12.10 meters (36 ft 4 in), 3.20 m (10 ft 8in) of side length and a basis diameter of 8.36 m (appr. 25 ft)
It was built around 47 BC by the astronomer Andronicus from Kyrros, a city in northern Syria founded by ancient Macedonians around 300 BC. Andronicus from Kyrros was an architect, specialized in building Sun and Hydraulic Time Measuring Devices. Why this clock was built here is unknown.
On the top of the conic roof there used to be a brazen wind pointer in the form of a Triton, which has been lost. There was an internal hydraulic Time measuring mechanism, now lost, to use when there was no sun. The monument was turned into a Baptisterion during the early Christian years and, later, into an Ottoman praying sacred spot. This saved the monument from the benevolent hands of Lord Elgin who, besides the Parthenon Marbles, was contemplating to transport the whole of this structure to England.
(Photos by Michael Tziotis)