After the main cast was announced in February, production is about to get under way on director Ron Howard's Robert Langdon adventure Inferno. BadTaste.it is reporting that filming is set to begin at the end of April in Florence, Italy, where shooting will take place until mid-May. Production will then move to Venice, Italy and then Istanbul, Turkey.Inferno is the third adaptation of Dan Brown's Robert Langdon novels, following The Da Vinci Code (2006) and Angels & Demons (2009).