An "arrondissement" is an administrative division used in several countries, most notably in France. In Paris, the capital city, there are 20 arrondissements, each with its own local government and unique character. They are numbered in a spiral pattern starting from the center of the city, making it easy to navigate. Each arrondissement has its own mayor and council, responsible for local services and community issues. The concept of arrondissements helps organize urban areas, ensuring efficient governance and representation for residents. Other cities, like Lyon and Marseille, also use arrondissements to manage their administrative functions.