http://agathe.gr/guide/library_of_pantainos.html
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). ... The north stoa of the Library of Pantainos, looking east toward the Gate of Athena. Figure 45. Rules of the Library of Pantainos: "No book is to be taken out because we have sworn an oath. ... At left is the Gate of Athena, the entrance to the Roman Agora.