Provides an in-depth look at the Kesslitz affair, a dramatic 1775 murder case in Hamburg involving a Silesian noble, Joseph von Kesslitz, and Count Visconti, a purported Italian adventurer. The text outlines the forensic details of Visconti's death, the subsequent legal investigation, and the diplomatic ramifications that drew in several European powers, including Prussia, Spain, France, and the Holy Roman Empire. It also profiles the key individuals involved—Kesslitz, Visconti, Anna Maria Romellini (Visconti's mistress and Sanpelayo's lover), and Antoine Sanpelayo (the Spanish consul)—exploring their personal histories, motivations, and social contexts within 18th-century European society and politics. The sources reveal the complex interplay between personal narratives, legal procedures, social norms, and international relations in the era.