Giovanni Francesco Barbieri, ‘Il Guercino’ – A Master of Dramatic Light and Shadow Giovanni Francesco Barbieri, universally known as Il Guercino (1591-1666), stands as a pivotal figure in the transition between Mannerism and Baroque painting. Born in Cento, a small town near Bologna, Italy, his early life was marked by a physical condition – a pronounced squint that earned him the nickname “il guercino,” meaning ‘the squinter.’ This v…