Between 1679 and 1681 Lorenzo Onofrio Colonna took the position of Viceroy of Aragon and moved to Spain for a few years. His time in Saragozza as a noble foreigner in a position of political power proved quite challenging and led him to spend most of his time in Madrid, so that he could also attend the celebrations for the wedding of King Charles II and try to negotiate some sort of deal with Maria, who lived in a convent in the city. The self-fashioning of a foreign diplomat in a new country also relied heavily on his ability to construct his identity through the objects, furniture, paraphernalia, and books that he took with him. This chapter considers Lorenzo Onofrio’s Spanish years, with a particular emphasis on his self-fashioning through the books, scores, and librettos he brought with him on this very meaningful journey.