Submerged site has many pieces and architectural components and monuments where was located at the city's Royal Quarter and believed to contain remains of the Temple of ISIS . East of the Eastern Harbor of Alexandria, from Cape Silsileh to sidiBishr promontory. Most important discoveries: - Many site were discovered at El-Hassan reef,Chatby,Ibrahimieh,Sporting EL-Kour islets and BirMas’oud. - A large number of amphorae, concreted on the seabed, cover the El-Hassan reef and its contours marking the location of several shipwreck -Two sites were discovered in Shatby , and one is the sub-merged part of cape Silsileh that formed part of the Royal Ptolemaic quarters - 400 architectural elements of various stones lie on the seafloor - At Ibrahimieh, two sites have also been discovered. Some 50 small- and medium-size stone anchors dating to the Islamic period were raised from the first site that lies on a large reef at 13–15 m depth, 450 m from the shore. The second site lies in the shallows and consists of a large stone quarry, some shaft tombs as well as a complex grid of fish tanks. - At El-Dahab, El-Kour islets and BirMas’oud promontory demonstrated that these three sites and the submerged areas between them formed a large necropolis dating to the Graeco-Roman period. - -Numerous stone anchors and fishing tackle was found on the seabed north of El-Kour islet.