The Archeological Museum of Eleusis is a museum in Eleusis, Attica, Greece.The museum is located inside the archaeological site of Eleusis. Built in 1890, by the plans of the German architect Kaverau, to keep the findings of the excavations, and after two years (1892) was extended under the plans of the Greek architect J. Mousis. There is a collection of objects dating from the 5th century BC, when the reputation of the temple was panhellenic, and the number of believers who moved there in order to attend the ceremonies of the Eleusinian mysteries had increased significantly.