This is a song and dance form quite different from its Spanish namesake. It originated in the last quarter of the 19th century with the founder of the traditional trova, Pepe Sánchez. He wrote the first bolero, "Tristezas", which is still sung today. The bolero has always been a staple part of the trova muusician's repertoire. The bolero proved to be exceptionally adaptable, and led to many variants. Typical was the introduction of syncopation, leading to the bolero-son, bolero-mambo and bolero-cha. The bolero-son became for several decades the most popular rhythm for dancing in Cuba, and it was this rhythm that the international dance community picked up and taught as the wrongly-named 'rumba'.