Foundations of the monumental entrance gate (Propylon) of the Pompeion. Kerameikos. Athens. Greece. The Pompeion was a public building used for preparation of festivals and processions, including the annual Panathenaic procession. The original building dates from the 4th century BC and consisted of an inner colonnaded court with several side rooms and a monumental entrance gate (Propylon). The building is located between the Sacred gate (on left) and the Dipylon Gate to the right. Serving as a burial ground as long ago as the 12th century BC, Kerameikos located in the ancient neighbourhood of potters contains part of the ancient city walls and the Dipylon, the main gate of Ancient Athens at a junction of the Sacred Way and Panathenaic Way. It served as a burial ground for the richest and most distinguished citizens of the city.