A double wall surrounding the quarantine compound prevented the diseases and their infected from escaping, the wall stands 7.45 meters high, it is 1.55 meters thick and covers a linear distance of 1210 meters. The entrance and exit points consisted of four gates and three docks, which corresponded to the subdivisions according to the medical bill of health. For the construction of this site, the remains from the ruined Sant Felip castle, which was on the south bank of the port, were used. This gate oriented towards the town of Es Castell is today the main entrance to the quarantine station. It is called Lions or Bourbons gate for the figures that accompany the coat of arms above the lintel. From here we access a corridor between two walls which form a moat of almost 13 meters wide that surrounds the quarantine compound and joins the various zones it’s divided into. The statue of Fidelius: to the right of the entrance stands a statue representing suffering humanity. This piece was commissioned in the fifties by the General Director of Health, Dr. José Alberto Palanca, to the Canarian artist Manuel Ramos. On the base are engraved the names of four scientists whose work has served to end the great epidemics: Pasteur, for his contributions in immunology; Koch, as the father of modern bacteriology; Ferran, for the vaccine against cholera, and Finlay, for discovering the propagator of yellow fever, the mosquito