Section D'or

Paris-based association of Cubist painters; the group was active from 1912 to about 1914.

The group’s name was suggested by the painter Jacques Villon, who had developed an interest in the significance of mathematical proportions such as the ancient concept of the golden section, thesection d’or. The name thus reflects the Cubist artists’ concern with geometric forms, although Villon and Juan Gris were the only Cubists who directly applied such concepts to their work. The principal members of the group were Robert Delaunay, Marcel Duchamp, Raymond Duchamp-Villon, Albert Gleizes, Juan Gris, Roger de La Fresnaye, Fernand Léger, André Lhote, Louis Marcoussis, Jean Metzinger, Francis Picabia, and André Dunoyer de Segonzac.

In 1912 the group first exhibited together at the Galerie la Boétie in Paris, and it also published a short-lived magazine entitled Section d’Or. The start of World War I in 1914 ended the activities of the group, which had never been more than a loose association.

A French term meaning 'golden section', this refers to an irrational proportion known since the time of EUCLID (c.3rd century BC) and once thought to possess a hidden harmonic proportion in tune with the universe.

It may be defined as a line divided in such a way that the smaller part is to the larger as the larger is to the whole.

ROBERT DELUNAY
French painter Robert Delaunay was one of the first artists to introduce vibrant color into Cubism, trend eventually known as Orphism. An important figure in 20th century art, Delaunay is often overshadowed by his contemporaries such as Picasso, Matisse and Barque. Delaunay and his wife, Sonia Terk Delaunay, worked on a large, impressive abstract mural together for the Paris Exposition in 1937.

Der Blaue Reiter

Der Blaue Reiter
The Der Blaue Reiter movement was a German expressionist art period lasting from 1911 to 1914. The name Der Blaue Reiter was taken from one of Kandinsky’s works, Le Cavalier bleu. The movement was led by Kadinsky, Klee, Marc, and Macke – a group of expressionist artists greatly influenced by the Brucke artists of the previous decade – the Der Blaue Reiter did not believe in the main objective of the Brucke movement (simply focusing on one group of artists). The Der Blaue Reiter artists attempted to find spiritual truths that they felt impressionists had not conveyed. The art movement was not stylistically unified as demonstrated by the range of pure abstractions created by Kadinsky versus the romantic images of Marc. The Der Blaue Reiter believed in changeability, new ideas, and the mixing of different ideas of spirituality and art.
Wassily Kandinsky  1866-1944

Wassily Kandinsky was a Russian painter, printmaker and art theorist. One of famous 20th-century artists, he is credited with painting the first modern abstract works. 
Kandinsky's purely abstract works followed a long period of development based on his personal artistic experiences. Fascination and unusual stimulation by color in his childhood, than his study of the folk art in the region, in particular the use of bright colors on a dark background; he used later in his paintings and reflected in much his early work.
For the most part, Kandinsky's paintings did not emphasize any human figures. There are some exceptions: "Sunday, Old Russia (1904)" and "Riding Couple (1907)". Fauvism is also apparent in these early works. Perhaps the most important of Kandinsky's paintings from the decade of the 1900s was "The Blue Rider (1903)". The type of intentional disjunction applied in this painting, allows viewers to participate in the creation of the artwork would become an increasingly conscious technique used by the artist in subsequent years-culminating in his great "abstract expressionist" works of the 1911-1914. In The Blue Rider Kandinsky shows the rider more as a series of colors than of specific details.