This is a transitional period. In the art of Florence and Siena there is a move away from medieval abstract depictions of space and the human body as artists began to focus on the illusion of mass and space and the expression of human emotion. With hindsight, it is possible to trace elements of Renaissance art back to this period. This century saw the creation of the beautiful poetry of Dante and Petrarch, but it is also the century that saw the worst outbreak of the Bubonic plague (known then as the Black Death) which wiped out close to half the population of Europe—a terrifying statistic, difficult to imagine today. This topic focuses on two Italian city-states—Florence and Siena, both proud republics in the 14th century, and the great painters of those city-states, Giotto and Cimabue in Florence, and Duccio, Martini and the Lorenzetti brothers in Siena.