The Sicilian Mafia, also known as Cosa Nostra, is a criminal organization that originated in Sicily, Italy, during the 19th century. It is involved in various illegal activities, including drug trafficking, extortion, and money laundering. The Mafia operates through a hierarchical structure, with a boss at the top and various members and associates beneath. The Sicilian Mafia has a significant influence on both local and international crime. It is known for its code of silence, or omertà, which discourages members from cooperating with law enforcement. Over the years, authorities have made efforts to combat the Mafia, leading to numerous arrests and trials.