Listed buildings are structures recognized for their historical, architectural, or cultural significance. In many countries, these buildings are protected by law to preserve their unique character and heritage. They can range from ancient monuments to modern constructions, and their listing helps ensure that any alterations or renovations are carefully managed. There are typically three grades of listed buildings: Grade I, Grade II*, and Grade II, with Grade I being the most significant. The listing process involves a thorough assessment by heritage organizations, such as Historic England in the UK, which evaluates the building's importance and condition before granting protection.