This watercolour is by Morichini the architect the architect who designed the studio and family home of Domenico Anderson (1854-1938) that was constructed in around 1900 at Piazza Fiume in Rome. Referred to within the family as "il villino di Piazza Fiume" it remained in the family for many decades as Domenico's sons, Giorgio and Alessandro Anderson, continued the family photography business that had been established by James Anderson (1813-1877). The building no longer exists.
Information kindly provided by Alex Anderson (Great grandson of Domenico Anderson, pers. email, 8 March 2012)