Gustav Otto (12 January 1883– 28 February 1926) was a German aircraft and aircraft-engine designer and manufacturer.

Otto was born in Cologne to Nikolaus August Otto, the founder of N. A. Otto & Cie. and inventor of the four-stroke internal combustion engine. It is therefore regarded that his interest in engines, specifically aircraft and the manufacture thereof, was something he inherited from his father at an early age.

Otto was regarded as successful and career-minded, and moved in elevated social circles. He attended a higher secondary school in Cologne, and had internships at machine tool manufacturers. Later, he attended the Technical Colleges in Hanover, Karlsruhe and Munich for further engineering study. He is believed to have remained in Munich after completing his studies to co-found the Bayrische Autogarage Company. Having a famous father, Gustav was driven to prove himself. However, like many sons of famous fathers, Gustav had a difficult time getting out from under his father's long shadow. Therefore he was prone to bouts of depression, which affected his work.

Paul Fejos (January 27, 1897 - April 23, 1963) was a Hungarian-born director of feature films and documentaries who worked in a number of countries including the United States.

Fejos was born in Budapest, Hungary as Pál Fejös. He emigrated to the United States in 1924 and became a naturalized citizen in 1930. He made four films in the US: The Last Moment (1928), Lonesome (1928), Broadway (1929) and The Last Performance (1929).

In 1936, he married Inga Arvad, a Danish journalist, noted for a romantic relationship with John F. Kennedy and known as the mistress of Axel Wenner-Gren.

In 1941, he became Director of Research of the Viking Fund, a non-lucrative association created the same year by Axel Wenner-Gren, a Swedish industrialist.

Gustav Klimt (July 14, 1862– February 6, 1918) was an Austrian Symbolist painter and one of the most prominent members of the Vienna Secession movement. His major works include paintings, murals, sketches, and other art objects. Klimt's primary subject was the female body, and his works are marked by a frank eroticism—nowhere is this more apparent than in his numerous drawings in pencil (see Mulher sentada, below).

Gustav Klimt was born in Baumgarten, near Vienna in Austria-Hungary, the second of seven children—three boys and four girls. All three sons displayed artistic talent early on. Klimt's younger brothers were Ernst Klimt and Georg Klimt. His father, Ernst Klimt the Elder, formerly from Bohemia, was a gold engraver. Ernst married Anna Klimt (née Finster), whose unrealized ambition was to be a musical performer. Klimt lived in poverty for most of his childhood, as work was scarce and economic advancement was difficult for immigrants.

In 1876, Klimt was awarded a scholarship to the Vienna School of Arts and Crafts (Kunstgewerbeschule), where he studied until 1883, and received training as an architectural painter. He revered the foremost history painter of the time, Hans Makart. Klimt readily accepted the principles of a conservative training; his early work may be classified as academic. In 1877 his brother Ernst, who, like his father, would become an engraver, also enrolled in the school. The two brothers and their friend Franz Matsch began working together; by 1880 they had received numerous commissions as a team they called the "Company of Artists", and helped their teacher in painting murals in the Kunsthistorisches Museum in Vienna. Klimt began his professional career painting interior murals and ceilings in large public buildings on the Ringstraße including a successful series of "Allegories and Emblems".

Gustav Mahler (German pronunciation: [ˈɡʊstaf ˈmaːlɐ]; 7 July 1860 – 18 May 1911) was a late-Romantic Austrian composer and one of the leading conductors of his generation. He was born in the village of Kalischt, Bohemia, in what was then the Austrian Empire, now Kaliště in the Czech Republic. Then his family moved to nearby Iglau (now Jihlava) where Mahler grew up.

As a composer, he acted as a bridge between the 19th century Austro-German tradition and the modernism of the early 20th century. While in his lifetime his status as a conductor was established beyond question, his own music gained wide popularity only after periods of relative neglect which included a ban on its performance in much of Europe during the Nazi era. After 1945 the music was discovered and championed by a new generation of listeners; Mahler then became one of the most frequently performed and recorded of all composers, a position he has sustained into the 21st century.

Born in humble circumstances, Mahler displayed his musical gifts at an early age. After graduating from the Vienna Conservatory in 1878, he held a succession of conducting posts of rising importance in the opera houses of Europe, culminating in his appointment in 1897 as director of the Vienna Court Opera (Hofoper). During his ten years in Vienna, Mahler—who had converted to Catholicism from Judaism to secure the post—experienced regular opposition and hostility from the anti-Semitic press. Nevertheless, his innovative productions and insistence on the highest performance standards ensured his reputation as one of the greatest of opera conductors, particularly as an interpreter of the stage works of Wagner and Mozart. Late in his life he was briefly director of New York's Metropolitan Opera and the New York Philharmonic.

Otto Klemperer (14 May 1885 – 6 July 1973) was a German conductor and composer. He is widely regarded as one of the leading conductors of the 20th century. His son, Werner Klemperer, became famous for his role as Colonel Klink on the CBS television sitcom, Hogan's Heroes.

Otto Klemperer was born in Breslau, Silesia Province, then in Germany (now Wrocław, Poland), as a son of Nathan Klemperer, a native of Prague, Bohemia (today's Czech Republic). Klemperer studied music first at the Hoch Conservatory in Frankfurt, and later at the Stern Conservatory in Berlin under James Kwast and Hans Pfitzner. He followed Kwast to three institutions and credited him with the whole basis of his musical development. In 1905 he met Gustav Mahler while conducting the off-stage brass at a performance of Mahler's Symphony No. 2, 'Resurrection'. He also made a piano reduction of the second symphony. The two men became friends, and Klemperer became conductor at the German Opera in Prague in 1907 on Mahler's recommendation. Mahler wrote a short testimonial, recommending Klemperer, on a small card which Klemperer kept for the rest of his life. Later, in 1910, Klemperer assisted Mahler in the premiere of his Symphony No. 8, Symphony of a Thousand.