The Land Walls of Constantinople, one of the longest and oldest surviving defence systems in Europe, stretch for 7.2 kilometres and border the so-called Historical Peninsula of today's Istanbul on the west side of the city. Dating back to the first quarter of the 5th century CE and included in the UNESCO World Heritage List in 1985, the walls comprise the Theodosian Walls, 5.7 km long, and the Blahernae Walls, which form the part extending from Tekfur Palace (Palace of the Porphyrogenitus) to...
