Tuscan florin was introduced by Duke Leopold II and replaced the pound, the distinct currency of Tuscany until the annexation by Napoleonic France in 1807.
The pound (Italian: lira) was the distinct currency of Tuscany until the annexation by Napoleonic France in 1807. So, when Duke Leopold II rose to power in 1824, he decided to introduce a new basic currency. The florin replaced the Tuscan pound at a rate of 1 3 pounds = 1 florin. 
