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Library of Pantainos Lying partially under and behind the Late Roman wall are the remains of a building identified by its inscribed marble lintel block as the Library of Pantainos, dedicated to Athena ... Library of Pantainos Lying partially under and behind the Late Roman wall are the remains of a building identified by its inscribed marble lintel block as the Library of Pantainos, dedicated to Athena Archegetis, the emperor Trajan, and the Athenian people in the years around A.D. 100 (Figs. 43, 44).