In 1638 Vicenzo Masculano da Firenzuola was invited to Malta by the Grand Master, Jean Paul Lascaris Castellar. He was an Italian born in 1578 who became a Dominican Cardinal and was later Vicar General of his Order. He was a friend of Galileo Galilei and was one of the most distinguished military engineers of the day. He placed his proposals before the Council on 28th September and recommended the encirclement of the Sta. Margherita hills. He envisaged a semi-circular enciente, enclosing Bormla, with six bastions and curtain walls linking them to the Vittoriosa and Senglea land-fronts. The Council approved the plan and the foundation stone was laid, with due ceremony, by Grand Master Lascaris on 30th December 1638.
Sta. Helena Gate (1736)
The decision to implement Firenzuola's plan did not prevent criticism from other engineers, among them Claudio Riccardo, Domenico Guazzo and Nicholas-Francois Blondel. They considered the design far too ambitious and costly. The critics notwithstanding, work on the lines continued until 1645 when a lack of funds caused work to stop. For the next twenty years the lines were all but abandoned.
Verdala Gate (1736)
Work on the Sta. Margherita Lines did not resume until 1715 under the direction of French engineer the Bali de Tigne. During the magistry of Manoel de Vilhena the Sta. Margherita Lines were finally completed, in 1736.
Sta. Helena Curtain