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How did Florence conquer Pisa in 1406?
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Florence
The Florence Cathedral, also known as the Duomo or the Cathedral of Santa Maria del Fiore, in Florence.
The conquest of Pisa by Florence in 1406 was facilitated by internal factional struggles within the Pisan city-state.1
While Florence had long sought to expand its influence over neighboring territories, the occupation of Pisa marked a significant strategic success that allowed Florence to become a maritime power. Following this event, Pisa remained under Florentine control until 1494, when it temporarily reasserted its independence during the French invasion of Italy, before being reconquered by Florence in 1509.21