1909
A.J. Finberg, A Complete Inventory of the Drawings of the Turner Bequest, London 1909, vol.I, p.517, CLXXVI 26, as ‘A town; probably Bologna’.
1984
Cecilia Powell, ‘Turner on Classic Ground: His Visits to Central and Southern Italy and Related Paintings and Drawings’, unpublished Ph.D thesis, Courtauld Institute of Art, University of London 1984, p.406, noting ‘bottom right, a view of the Madonna di S. Luca on its hill’.
2008
James Hamilton, ‘Turner e l’Italia’ in Hamilton, Nicola Moorby, Christopher Baker and others, Turner e l’Italia, exhibition catalogue, Palazzo dei Diamanti, Ferrara 2008, pp.43, 90 note 22, as a Bologna subject.
2009
James Hamilton, ‘Turner’s Route to Rome’ in Hamilton, Nicola Moorby, Christopher Baker and others, Turner & Italy, exhibition catalogue, National Galleries of Scotland, Edinburgh 2009, pp.42, 150 note 22, as a Bologna subject.