Manoel Fort stands on the of point of Manoel Island in Marsamxett Harbour Designed as a star fort much of its ditches and walls are formed by the native rock of the island It was built by the Knights of St John between 1723 and 1755 under the patronage. Manoel Fort stands on the of point of Manoel Island in Marsamxett Harbour Designed as a star fort much of its ditches and walls are formed by the native rock of the island It was built by the Knights of St John between 1723 and 1755 under the