This monument is located East of the State Agora and outside the part you need tickets for. First excavated in 1865 by J. T. Wood. Apart from a short field campaign in 1908, work on the monument was not re-established until 1997 by the Austrian Archaeological Institute and the Austrian Academy of Science. Originally built as a fountain in the 2nd century A.D., the building was adapted to a church in Byzantine times (5th-6th century A.D.). After destruction in the 7th century, the church and a cemetery located nearby were kept in use until the Medieval Period. The latest finds at this site date into the 12th-14th centuries. The Byzantine church was built on a high podium on top of a crypt. The graves in and around the crypt support the hypothesis of this being a memorial church to house the relics of a famous saint. Due to the fact that the southern entrance into the crypt was flanked by two pilasters showing oxen and crosses, the building was originally interpreted as the grave of St. Luke, as the bull has traditionally been used as the symbol of St. Luke.