In this plaza was situated the so-called "Puerta de Siete Puertas" (the Gate of 7 Doors) or "Puerta de Orihuela" (the Gate to Orihuela). It was built in the 12th century on the site of an Islamic cemetery, restructured in the 15th century, and demolised in 1868. The remains and history is shown in the Visitor's Center of the City Wall of Saint Eulalia, built in the year 2006. (Source, Municipality of Murcia)
In followings days I will show pictures of the wall inside.
(Click on Muslim past label to see another picture of other piece of the wall in this city)