Cecilia Powell has identified the subject of this sketch as Genzano, one of the ‘Castelli Romani’, sixteen communes within the Alban Hills, situated on the high western shore above Lake Nemi.1 Turner’s viewpoint is a spot to the south-east of the town looking up towards the church and bell-tower of Santa Maria della Cima with the tree-lined road leading towards Ariccia in the background. A corner of the Palazzo Sforza Cesarini is just visible at the right-hand edge of the town. The town was badly damaged by bombing during the Second World War and apart from the surviving church and palace, the prospect today looks very different. The chestnut trees which Turner makes a point of annotating are a characteristic feature of the countryside in this part of Italy.
Powell 1984, p.422.