Cosa Nostra is a Sicilian Mafia organization that originated in Sicily, Italy, during the 19th century. It is known for its secretive nature, hierarchical structure, and involvement in various criminal activities, including extortion, drug trafficking, and money laundering. The term "Cosa Nostra" translates to "Our Thing," reflecting its emphasis on loyalty and secrecy among members. The organization has a significant influence in both Italy and the United States, particularly in cities like New York and Chicago. Over the years, law enforcement agencies have made efforts to dismantle its operations, leading to numerous arrests and convictions of key figures within the group.