The slow English waltz was developed in the early part of the 20th century and is played at a tempo of about 30 bars per minute. The basic figures are based upon a diagonal pattern, producing a smooth, easy progression around the dance floor. The modern waltz was introduced at the first ever World Championships, held in London in 1922. Usually, the waltz is the first dance to be taught to beginners; it is ideally suited for people to gain confidence as it has a simple construction, regular changes of weight and a slow tempo.