Leviathan of Parsonstown...
... or the 6 foot telescope of William Parsons, 3rd Earl of Rosse (1800-1867). The photo also features (following much debate!) Lawrence Parsons, 4th Earl of Rosse (1840-1908).
Great photo, and this allows us to add another photo to the small cache of Offaly photos we have on here - taken at Birr Castle, Parsonstown, Offaly.
Photographer: Robert French
Collection: Lawrence Photographic Collection
Date: Around 1880s
NLI Ref.: L_ROY_03237
You can also view this image, and many thousands of others, on the NLI’s catalogue at catalogue.nli.ie