An archaeological survey of the Thracian hinterland of Constantinople led by James Crow (Newcastle University) began in 1994 and its first stage is due for completion this year (2000). The main focus of the project over the past five years has been the Anastasian Wall, a 6th-century monumental linear fortification stretching some 56 km from the Black Sea to the Sea of Marmara and situated c. 65 km from the city itself. In places the Wall survives up to 5 m high, but for the most part it lies obscured deep within the forests of central and northern Thrace, together with its associated forts, an outer ditch and a complement of massive towers.