Pantheon Watercolour
Notes now here.
'The Pantheon, the morning after the fire' was part of the Turner Bequest and there is no doubt that it is a watercolour (Tate: "Graphite and Watercolour on Paper"). The image scale is 1pixel represents 5mm.
'The Pantheon, the morning after the fire' 1792 No. 472, Tate D00121,
watercolour drawing approx 15" x 20"