Original: The Genoese felt the need for shelter from the sea storms and in 1380 began to construct, under Governor Leonello Lomellini, a bastiglia, Italian for stronghold or citadel.
Simplified: The Genoese felt the need to defense the city from the sea storms and began to construct walls and builings, in the time of governor Leonello Lomellini, in 1380, a bastiglia, also known as a citadel.