The Theodora caves 5 kilometers (3.1 mi) south of Meteors had inhabitants fifty millennial ago.[4]The
oldest known example of a man-made structure was found within a
prehistoric cave in central Greece, according to the Greek culture
ministry. The structure is a stone wall that blocked two-thirds of the
entrance to the Theodora cave near Kampala on the north edge of the
Thessalonian plain. It was constructed 23,000 years ago, probably as a
barrier to cold winds. “An optical dating test, known as Optically
Stimulated Luminescence, was applied on quartz grains nested within the
stones. We dated four different samples from the sediment and soil
materials, and all provided identical dates,” Nikolaos Zacharias,
director of the laboratory of archaeology at the
University of Peloponnese, told Discovery News. According to a statement
by the ministry of culture, “the dating matches the coldest period of
the most recent ice age, indicating that the cavern’s inhabitants built
the stone wall to protect themselves from the cold.” Excavated since
1987, the Theodora cave is well known to palaeontologists as it was
used and inhabited continuously from the Palaeolithic period onwards
(50,000 to 5,000 years ago)
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