1934
Copenhagen: Young artists are grouped in Linien (1934-1939) around surrealistic ways of expressions.

Carl-Henning Pedersen, Asger Jorn, Henry Heerup, Egill Jacobsen, Ejler Bille and Sonja Ferlov

1937
Copenhagen: Egill Jacobsen paints Ophobning. This marks the beginning of the new spontanic way of expression.

1939
Copenhagen: A group of painters called Høst (1939-1950) are founded mainly for exhibition purposes.

Asger Jorn, Ejler Bille, Carl-Henning Pedersen, Henry Heerup, Egill Jacobsen, Else Alfelt, Sonja Ferlov, Erik Ortvad, Erik Thommesen, Knud Nielsen and Svavar Guðnason

1941
Copenhagen: Foundation of the periodical Helhesten (1941-1944).

Asger Jorn, Ejler Bille, Carl-Henning Pedersen, Henry Heerup, Egill Jacobsen, Else Alfelt, Sonja Ferlov and Svavar Guðnason

Paris: Foundation of the surrealistic magazine La Main et la Plume.

Dotremont

1945
Brussels: International conference of the Revolutionary Surrealists organized by Dotremont.

1947
Liege: Foundation of Realité a small group of artists in Belgium with similar goals as the artists of Cobra.

1948
Amsterdam: Foundation of the Nederlandse Experimentele Group. Their magazine Reflex was published once in 1948 and once in 1949.

Paris: Foundation of the Cobra movement in November, 1948.

Copenhagen & Brussels: Publication of the first issue of the periodical Cobra.

1949
Brussels: Publication of the Petit Cobra magazine and the Tout Petit Cobra flysheet.

Bregnerød, Denmark: Mural painting inside of a small house belonging to the danish Architect Scool.

Asger Jorn, Carl-Henning Pedersen, Mogens Balle, Alfred H. Lilliendahl, Dotremont, Stephen Gilbert, Carl Otto Hultén and Anders Österlin.

Amsterdam: The first International Exhibition of Experimental Art at the Stedelijk Museum of Amsterdam.

1950
Copenhagen: Publication of the Cobra Library, 15 small booklets about 15 different Cobra artists.

Brussels: Making of the Cobra movie Persephone.

Paris: Several Cobra artists exhibits at Tendances and Salon des Surindépendants.

1951
Liege: The second International exhibition of Experimental Art. This was the last exhibition in Cobra time, and soon after the movement ended.