 Complete the following phrase:  The Floriana Lines  are a line of fortifications in Floriana, Malta, which surround the fortifications of Valletta and form the capital citys outer defences. Construction of the lines began in 1636 and they were named after the military engineer who designed them, Pietro Paolo Floriani. The Floriana Lines were modified throughout the course of the 17th and 18th centuries, and they saw use during the 