The Birthplace of Democracy - The Pnyx

Traveler  Monument of Philopappos

Traveler  Up on Filopappou Hill is The Pnyx. Beginning as early as 507 BC, the Athenians gathered on the Pnyx to host their popular assemblies, thus making the hill one of the earliest and most important sites in the creation of democracy.

Traveler  Altar of Zeus Agoraios "From Wikipedia, the free encyclopedia" The Altar of Zeus Agoraios (meaning Zeus of the Agora) is a 4th-century BC altar located north-west of the Ancient Agora of Athens, constructed from white marble, 9 m deep and 5.5 m wide.[1] It was one of the first objects to be discovered inside the Agora during the excavations of 1931. Evidence of marks done by masons from the Augustan period show that it was moved from an initial source later identified as the Pnyx located outside the ancient Agora.[2] An ancient scholar noted: "it may not be coincidence that Zeus, whose special task it was to govern the political assemblies of the Athenians, should depart the Pnyx at just the time when Augustus is said to have curtailed sharply the powers of those same assemblies."

Traveler  The metonic calendar incorporates knowledge that 19 solar years and 235 lunar months are very nearly of the same duration. Consequently, a given day of a lunar month will often occur on the same day of the solar year as it did 19 years previously. Meton's observations were made in collaboration with Euctemon, about whom nothing else is known. The Greek astronomer Callippus expanded on the work of Meton, proposing what is now called the Callippic cycle. A Callippic cycle runs for 76 years, or four Metonic cycles. Callippus refined the lunisolar calendar, deducting one day from the fourth Metonic cycle in each Callippic cycle (i.e., after 940 synodic lunar periods had elapsed), so as to better keep the lunisolar calendar synchronized with the seasons of the solar year. (from https://en.wikipedia.org/wiki/Meton_of_Athens)