Decelea, Ancient deme in Attica, Greece
Decelea was an ancient deme in Attica positioned on the eastern side of Mount Parnes, where it controlled a key road toward Boiotia and Euboea. Today the site contains an 800-meter circuit wall encircling Palaiokastro, which later served as a cemetery within the grounds of a former royal estate.
The Spartans established a permanent military base here in 413 BC under King Agis II, disrupting Athens' supply lines during the Peloponnesian War. This military occupation lasted for an extended period and remained strategically significant throughout the conflict.
This place was home to the Demotionidai phratry, whose name appears in ancient inscriptions found in the area. These records reveal how families and communities were organized within ancient Athenian society.
The location sits at an elevated position on the mountainside and requires some physical effort to explore thoroughly. Access conditions can vary depending on season and weather, so sturdy footwear is advisable for visitors.
From its elevated perch, lookouts could watch ships entering Piraeus harbor while simultaneously controlling the grain trade route between Athens and Oropus. This dual control function made it one of the region's most important observation and command points.
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