The main sketch on this page represents a view of the Roman Forum looking east from the Temple of Castor and Pollux. Turner’s viewpoint is in front of the columns of the temple looking towards the Church of San Lorenzo in Miranda (which incorporates the Temple of Faustina and Antoninus). He seems to have sketched in the second column over the top of the buildings in the background.
Alongside the left-hand foredge of the page, with the book held in portrait format, Turner has made a detailed study of the three Corinthian capitals of the Temple of Castor and Pollux. For a general discussion of the Forum, see the Albano, Nemi, Rome sketchbook (Tate D15355; Turner Bequest CLXXXII 32).