Not on display
The subject of this sketch appears to be the Ponte Romano, a distinctive single arch Roman bridge which spans the Diveria river south of Varzo, near Crevoladossola.1 Popularly known as the ‘New Bridge’, the crossing was built around 1300 AD to replace the previous structure erected by Augustus. Turner passed the bridge en route from the Simplon between Gondo and Domodossola. A further sketch can be seen on folio 22 (D16930).
Compare the print after C. Hullmandel, Between Crevola and Gondo, in Views to Illustrate the Route of the Simplon, London 1822, pl.XXXII.