Porto city walls are a medieval fortification that was built in the 14th century. Known as the Walls of Dom Fernando (Muralhas de D. Fernando) these walls enclosed what was then the extent of the city.
Whilst the best preserved sections of the wall Fernandino wall fortifications is preserved in the cliffs of Guindais, near the cathedral, much of the walls still remain. Over the years they have become incorporated into the streets and buildings of Porto.
This particular section of wall is located at Escadas do Caminho Novo, which lies just in front of the Largo do São João Novo.