Teo Otto (1904 - 1968) was a Swiss stage designer. He trained in Kassel and Paris and in 1926 taught at the Bauhaus in Weimar. In 1928 he became an assistant at the Berlin Staatsoper. Following the Nazi's seizure of power in Germany, he returned to Switzerland where he was resident designer at the Zürich Schauspielhaus for 25 years.

Ratko Delorko is a German pianist, composer, producer and conductor. He was born in Hamburg in 1959 and studied in Düsseldorf, Cologne and Munich. His concert activity has taken him to concert halls all over the world and his repertoire covers works from baroque to contemporary music. He has recorded Gershwin’s complete piano oeuvre, Mozart piano concertos, and a live Chopin recital at the Berlin Philharmonic. He also performs at open air events, and has held a concert in the Dachstein Ice Cave in the Austrian Alps.

Delorko’s versatility is shown by his explorations of works by lesser known composers and his many first recordings of previously unknown compositions. He also plays ‘Jazz meets Classic’ concerts together with Christoph Spendel.

Ratko Delorko’s compositions include music for piano, chamber music, orchestral works and electronic music. He has recorded a CD with the title The History of the Piano for the New Classic Colours label. This album includes selections from the baroque era to contemporary, performed on twenty different original keyboard instruments of the respective eras. This project has been expanded for performances at concert venues, and enthusiastic reviews have commended the artist for his artistic dedication linked with modern technology. He has performed and recorded two Beethoven piano concertos on several of these instruments.