Ratas del Viejo Mundo treats scores by well-known composers and music from the street (anonymous, folk) with equal value. It combines traditional with classical instruments as well as with voices. Ratas del viejo Mundo has performed in the Netherlands, Denmark, Spain, Belgium, the Czech Republic, Italy and the United States. In 2019 they performed Sumava, a production with South-American circus virtuosos and madrigals by De Monte. A high-profile collaboration with Sidi Larbi Cherkaoui is currently in the works. The ensemble's recordings have received worldwide acclaim.