Classic interior design is derived from Greek and Roman design. This type of interior design is based upon order, balance, and perfect harmony. Classical design does not include any modern elements or current influences. Instead, it is steeped in tradition. In order to distinguish classical design from other types of design, it is important to understand the idea behind a focal point. When it comes to flooring options, classic interior design concepts does not stray that far from the flooring materials once used by the Ancient Greeks and Romans. Wood, marble, slate, and stone are all ideal choices. Marble and stone can be placed in a geometric pattern in order to create an interesting, and calculated, look. Classically designed rooms often contain large focal points. A large fireplace, grand table, or impressive staircase are good examples of focal points that are often used. Once a designer has chosen the focus of a room, all other items within the room are placed in order to enhance the look of the chosen focal point.