In 1787, in the Count of Floridablanca of Charles III of Spain, the Prime Minister gave the order for the construction of such a quarantine station or Lazareto in the Harbour of Mahón. However, the work did not begin until 1793 when the stone from the ruined fortress was put to good use and ferried across the harbour by boat to be recycled and used for much of the construction of the quarantine station. This work was then interrupted by the third British occupation of 1798-1802, but completed in 1807. The Lazareto was finally opened in 1817 and was in full use until 1917.
The historic islet of Lazareto in Mahon Harbour is today open to the pubic for guided tours from mid-July to mid-October.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.