The medieval walls and gates of Lisbon were part of the Muslim defensive system, built between the 10th century and 12th. During the Muslim period only the castle and Alfama neighbourhood existed. Later, in the late 13th and 14th centuries, D. Dinis and D. Fernando ordered the walls to be repaired and enlarged, to address both the expansion of the city and the growing tension with Castille.
Arco da Portas do Mar
Today, there are still few remains of the these medieval structures scattered around the old district. Over the centuries, many new arches or doors were opened to provide access to Alfama district. One of them is Arch of Sea Ports (Arco da Portas do Mar), which is situated at Rua dos Bacalhoeiros, facing the River Tagus. This 3.7m wide and 9m long door serves as a link between the street of Bacalhoeiros and Afonso Street Albuquerque. This arc was once a Muslim watchtower in the medieval walls of Lisbon. Close to Chafariz Del Rey on R. Cais de Santarém lies another door. There is a strong possibility that this door (arch) was built between two towers of the wall.
Arco de Jesus & Postigo do Marques do Lavradio
Stairs lead from Rua de Sao Joao da Praca through Arco de Jesus to Rua Cais de Santarem. Acro de Jesus is an arch like structure was once part of Lisbon’s defensive system. This door one of the oldest doors in Lisbon, during the Muslim period it was called Bab al-Madiq. Bab al-Madiq provided an access between the beach and the inner city. Situated at Rua da Alfandega (close to Arco de Jesus) is the Wicket of the Marquis of Lavradio (Postigo do Marques do Lavradio). The reasons to open this small gate was opened to serve the Palace of Marquis of Lavradio in the 17th century. It also served the general public.
Arco da Preguica
Preguica Arch (Arco da Preguica) is known to have existed from the 15th century (atleast). By opening this gate was to allow access to the Fonte Nova (the new Fountain), just outside the city walls. In the 16th century, this water supply source was known as Fonte Nova de Porta do Mar (the New Sea Gate Fountain) or Fonte de Preguica, hence the name suggests. At Rua da Saudade, close to Museu do Teatro Romano, there is a large chunk of a wall like structure. It gives a hint that it might had been part of the city wall extending all the way to the Castle of San Jorge.
Porta do Sol
One of the most famous doors of Lisbon was Porta do Sol (Bab al-Maqbara in Arabic). Nowadays, Igreja de Santa Luzia (Church of Santa Luzia) sits at the top of the remains of the door. During the Muslim period, a cemetery had existed here, hence the name (Bab al-Maqbara), later the name change to Almocavar. This part of the medieval door has a terrace (at upper and lower levels) which is a magnet for the tourists to have the wonderful views of the River Tagus. Sections of Lisbon’s medieval wall can be seen at Rua Judiaria. This is the area in old district where Jews of Lisbon lived during the Muslim period. This appears to be the remains of a watchtower and at the top of it there is a house with a small garden.
Couraca
Couraca ( a double wall) was built here which connected the tower of Saint Peter to the walls’ perimeter. It is believed that this wall was built around 14th century as part of the Fernandine wall (1373-1375). It has a small gate (wicket) for pedestrians, its walling up was done in 1650 due to the threat of a Castilian invasion.
Poet’s Fountain (Fonte do Poeta) at Rua da Judiaria. A sign beside the fountains says ‘ this fountain is just fixed, please don’t damage it’.
Patios of D. Fradique
Two patios of D. Fradique of Up and Down, this is the beginning of the longest wall (86m). This section of the wall stretches from the Belmonte Palace to the Azurara Palace. The towers were integrated into the Belmont Palace in the 16th century. Accounts from the 1147 conquest of Lisbon suggest that in this area, part of the wall was destroyed by the crusaders.
Watchtower
A cafe or bar is built in the old watchtower, a sign with the name can be seen to the right. I was informed by the receptionist that this tower now houses craftsmen which can be visited for a steep fee. A section of the medieval wall is also found in the Casa dos Bicos. Old Muslim walls of Lisbon had existed here in the past but they were demolished to make way for this house.