The PHD thesis is focused on the transcription and analysis of an unpublished manuscript nineteenth-century, preserved in a private collection, which recounts events about Piedmontese Giuseppe Verani, became a court painter during the long roam through Italy in the wake of Duca d'Aosta, then King Vittorio Emanuele I, in exile because of the Napoleonic invasion of Piedmont. Particular attention is devoted to the period in which the royal family stayed in Cagliari, from 1806 to 1815, much prolific abut multifaceted activities by Verani. Educated to drawing from his father, the Turin artist Agostino Verani, Giuseppe developed a special aptitude for the landscape painting, a genre that allows him to combine an interest in landscape, so the soul of artist, with rigor topography of the scientific and technical design, assimilated through the attendance of the military environment. The views are flanked by the most varied activities, from decorations in the royal residences to designs for flags and uniforms, until the creation of the figures for the crib. These works are described in detail in the manuscript to witness the maturation of a long professional experience. On the strength of the manuscript and of discovery of works signed by Verani we are advancing a number of attributions of decorative works made in Cagliari until now considered to Anonymous.