Daguerreotype by Alexander John Ellis (1814-1890). One of a series of topographical and architectural views which are among the earliest known photographs of Italy. Ellis wanted to use them as the basis of a series of engravings in a proposed publication called 'Italy Daguerreotyped'. The daguerreotype proces, invented by Louis Daguerre (1787-1851) was one of two pioneering photographic proceses announced in 1839. Each image is a direct positive produced on sensitised metal plates in a long and complex procedure.
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