The phrase "south of the Mason Dixon line" refers to the region in the southern United States. However, there are several synonyms to refer to this area, such as "the South," "Dixie," or "the Southern states." The term "the Bible Belt" also refers to the region because of its high concentration of religious fundamentalism. The term "Old South" or "Antebellum South" refers to the time period before the Civil War when slavery was legal and the Southern states were primarily agricultural. Additionally, some people refer to the region as the "Deep South" because of its unique cultural identity and distinct accents. Regardless of the terminology used, the region has a rich history and cultural heritage that is celebrated throughout the United States.