The term for the oldest part of a city is "historic core" or "old town." This area usually contains the earliest settlements and important historical buildings, reflecting the city's architectural heritage and evolution over time. The historic core often features landmarks, such as cathedrals, palaces, and city squares, showcasing cultural and historical significance. Many historic cores are protected due to their importance, with regulations on development to preserve their character. Visitors are often drawn to these areas for their charm, walking paths, and cultural experiences, making them vibrant centers of tourism and local life.