Best known for its grace and beauty, ballroom dance is a sublime family of dances. Ballroom dancing may refer to a broad range of partnered dances. Often, though, the term refers to the smooth dances, such as waltzand tango, which have a line of dance, as opposed to the rhythm dances, such as rumba, salsa, cha cha and swing, which do not have a particular line of dance. The waltz and Viennese waltz harken back to the beginnings of ballroom dance in seventeenth-century Europe. Before ballroom dances reached great heights of popularity, folk dances were all the rage among the lower classes, and more courtly dances like the minuet, which are now classed as historic dances, were popular among the upper classes. Ballroom dance combined the simplicity of the folk dance with the structure of the oftentimes very complex historic dances. Other ballroom dances have the delightful flavor of the 1920s: the foxtrot and the quickstep were created during this roaring decade. Overall, the ballroom dance family is exciting and lyrically beautiful.