White Castle is a fast-food restaurant chain known for its small, square hamburgers, often referred to as "sliders." Founded in 1921 in Wichita, Kansas, it is one of the oldest fast-food chains in the United States. The restaurant specializes in serving affordable, quick meals, primarily featuring its signature sliders, which are made with beef and served on a soft bun. The chain has a distinctive white and blue color scheme and is recognized for its unique approach to fast food, including 24-hour service at many locations. White Castle has also gained a cult following, often celebrated in popular culture, including movies and television shows.