The Santa Margherita Ligure fortress is located at the foot of a hill on which the Villa Durazzo-Centurione now stands. It was built following a resolution by the Senate of the Republic of Genoa in 1550, and it was meant to defend against raids from the Barbary pirates. It was designed by Antonio de Càrabo, who was also responsible for the construction of the Castello di Rapallo.
Construction began in 1550 and it was completed by September of the same year. Various structural interventions and armament upgrades took place until the early 17th century. After pirate attacks ceased in the 18th century, the fort lost its military importance and only some repair and maintenance works were undertaken.
In the 19th century, there were plans to demolish the building twice: first to build a new municipal building after Rapallo was established as an independent municipality, and then to enlarge the adjacent Calata Vittorio Emanuele. It was restored after World War I and it was dedicated in the memory of the fallen in that war.
References:The Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.