Adolf Franz Karl Viktor Maria Loos (10 December 1870 – 23 August 1933) was an Austro-Hungarian architect. He was influential in European Modern architecture, and in his essay Ornament and Crime he repudiated the florid style of the Vienna Secession, the Austrian version of Art Nouveau. In this and many other essays he contributed to the elaboration of a body of theory and criticism of Modernism in architecture.

Born in 1870 in Brünn (Brno) to an ethnically German family, Loos was nine when his father, a stonemason, died. He completed technical school in Liberec, Czech Republic, which is now Technical University Liberec (a plaque located in front of Pavilion H commemorates this) and later studied at Dresden Technical University before moving to Vienna.

Loos stayed in America for three years, where he had an uncle living in Philadelphia. He visited the 1893 Columbian Exposition in Chicago, and appreciated the work of Louis Sullivan. He visited St. Louis and did odd jobs in New York. Loos returned to Vienna in 1896 a man of taste and intellectual refinement, immediately entering the Viennese intelligentsia. His friends subsequently included Ludwig Wittgenstein, Arnold Schönberg, Peter Altenberg and Karl Kraus. He quickly established himself as the preferred architect of Vienna’s cultured bourgeoisie. Searching for marble in 1904 he first visited the island of Skyros and was confrontated with the cubic architecture of the Greek islands.

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".