The Areopagus or rocky hill in Athens, north-west of the Acropolis, where the Athenian supreme tribunal and court of morals was held. From some part of this hill Paul delivered the address recorded in Acts 17:22-31.
Easton’s Bible Dictionary
Mars Hill
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.