Polka in the 19th century also wrote many polkas to satisfy the demands of the dance-music-loving Viennese. In France, another dance-music composer Emile Waldteufel also wrote many polkas in addition to his chief profession of penning waltzes. The polka evolved during the same period into different styles and tempi. In principle, the polka written in the 19th century has a 4-theme structure; themes 1A and 1B as well as a 'Trio' section of a further 2 themes. The 'Trio' usually has an 'Intrada' to form a break between the two sections. The feminine and graceful 'French polka' (polka française) is slower
Polka polka op. 45 and other examples. Earlier, Johann Strauss I and Josef Lanner wrote polkas designated as a "galop" (quick tempo) or as a regular polka that may not fall into any of the categories above. The polka was a further source of inspiration for the Strauss family in Vienna when Johann II and Josef Strauss wrote one for plucked string instruments (pizzicato) only, the well-known 'Pizzicato polka'. Johann II later wrote a 'New pizzicato polka' (Neu pizzicato-polka), opus 449, culled from music of his operetta 'Fürstin Ninetta'. Much earlier, he also wrote a 'joke-polka' (German "scherz-polka") entitled 'Champagne-polka', opus