May 8: Arnold Heinrich Rönnebeck born Nassau, Germany (then Prussia) to Richard and Anna Rönnebeck.
Graduates from Dorotheen Reel Gymnasium, Berlin.
Studies architecture at the Royal Art School, Berlin.
Studies sculpture in Munich.
Moves to Paris, France to study sculpture with Aristide Maillol and Émile-Antoine Bourdelle.
Meets and befriends Marsden Hartley.
Frequent guest of Gertrude Stein at her Saturday "evenings".
October 1-November 8: Bronze Head of Marsden Hartley exhibited at Salon d’Automne, Paris, France.
January-February: Rönnebeck's c1912 bronze Head of Marsden Hartley is shown in the "Exhibition of Paintings by Marsden Hartley of Berlin and New York" at Alfred Stieglitz's Gallery 291 in New York, New York.
Serves as an officer in the German Imperial Army. Receives Iron Cross First Class, Iron Cross Second Class and the Cross of Hanseates. Injured in the line of duty in the Battle of the Marne, France in 1915. Upon release from the hospital, continues to serve until the end of the war.
Returns to Berlin.
Travels throughout Italy with German writer Max Sidow and German poet Theodor Daubler. Executes a series of drawings and lithographs of Positano and the Amalfi Coast.
Berlin. Executes two Marsden Hartley heads and two Marsden Hartley masks.
November: Arrives in the United States. Lives in Glendale, Maryland, followed by New York, New York.
February-March: Exhibits Dancing Youths and Positano lithograph in the Corcoran Gallery's exhibition of the Society of Washington Artists, Washington, DC.
Gives several lectures on modern art in Washington, DC.
August: Spends some time in Lake Placid, New York. Executes various portrait busts and drawing of Mirror Lake.
October: Spends one week as the guest of Alfred Stieglitz at his Lake George, New York home. Takes photographs of Stieglitz photographing Georgia O'Keeffe.
March: Rönnebeck's essay, “Through the Eyes of a European Sculptor”, appears in the catalog for the Anderson Gallery exhibition, "Alfred Stieglitz Presents Seven Americans: 159 Paintings, Photographs & Things, Recent & Never Publicly Shown, by Arthur G. Dove, Marsden Hartley, John Marin, Charles Demuth, Paul Strand, Georgia O’Keeffe, Alfred Stieglitz."
April-May: Over sixty pieces including sculpture, drawings and lithographs in solo exhibition at Weyhe Gallery, New York. “Sculpture, Drawings and Lithographs by Arnold Rönnebeck".
July: Travels to Taos, New Mexico to stay as the guest of Mabel Dodge Luhan at her ranch, Los Gallos. Executes a series of drawings, watercolors and lithographs of Southwestern themes. Meets artist Louise Harrington Emerson (1901-1980).
October 1925-February 1926: Travels to Omaha, Nebraska to execute Grief, a monument for the Mengedoht family. Executes several portrait busts of prominent Omaha citizens. Exhibits eight sculptures at the Omaha Society of Fine Arts.
March: Marries Louise Harrington Emerson in New York. The couple travels throughout the west with stops in San Diego, Los Angeles and Denver.
April: Exhibits sculpture Fine Arts Gallery in San Diego, California.
May: Exhibition, "Drawings by Arnold Rönnebeck" at the Chappell House, Denver Art Museum, Denver, Colorado.
June: Exhibits sculpture at Los Angeles Museum in Los Angeles, California. Fine Arts Gallery in San Diego, California.
Settles in Denver, Colorado and becomes the Director of the Denver Art Museum.
February: Son Arnold Emerson Ronnebeck born.
Summer: Spends the summer in Santa Fe executing a series of relief panels for the La Fonda Hotel, Santa Fe, New Mexico.
Completes terra cotta relief panels for the La Fonda Hotel, Santa Fe, New Mexico.
Completes reredos entitled Madonna and Child at St. Martin's Chapel, Denver, Colorado.
Completes six terracotta panels entitled The History of Money for the mezzanine of the Denver National Bank, Denver, Colorado.
Receives gold medal from the Kansas City Art Institute for his lithograph, The Atlantic.
March-September: The Dancer included in Ralph T. Walker's exhibit, "Man's Study for a Country House" at The Architect and Industrial Arts Exhibition of Contemporary American Design, The Metropolitan Museum of Art, New York, New York.
May: Daughter Annamarie Ursula Ronnebeck born.
June-August: Sails to Germany with Louise on the S.S. Dresden, returns on the Hamburg Amerika Line.
May-June: Exhibits Wall Street in The Exhibition of Contemporary American Prints at the Victoria and Albert Museum, London, England.
June: Resigns as Director of the Denver Art Museum.
December: Exhibits lithograph, From the Tribune Tower at the Second International Exhibition of Lithography and Wood Engraving at the Art Institute of Chicago, Chicago, Illinois.
Completes The Ascension reredos for Church of the Ascension, Denver, Colorado.
February: Exhibition "Arnold Rönnebeck: Sculpture and Photographs" at the Dallas Museum of Art, Dallas, Texas.
Becomes a U.S. citizen.
December: Exhibits sculpture entitled Waste in the Biennial Exhibition of Contemporary American Sculpture, Watercolors and Prints at the Whitney Museum, New York, New York.
June-November. Exhibits brass sculpture entitled The Dancer (executed in 1921), at the Century of Progress World's Fair in Chicago, Illinois.
Executes bas-relief aluminum friezes of stylized Pueblo and Hopi Indian Kachina masks for the auditorium of the Colorado Springs Fine Arts Center, Colorado Springs, Colorado.
February: Exhibits in Society of American Etchers at the National Arts Club, New York, New York.
Executes Ways of the Mail, three terra cotta relief panels for the Longmont, Colorado Post Office as part of the Treasury Department's Section of Fine Arts program.
March: Exhibits sculpture Homage to Maurice Ravel in the Biennial Exhibition of Contemporary American Sculpture, Watercolors and Prints at the Whitney Museum, New York, New York.
October-November: Exhibits lithograph Chicken Pull in Contemporary American Prints at the Grolier Club, New York, New York.
January: Exhibits fifteen surrealist oil paintings at Chappell House, Denver, Colorado.
May-June: Exhibits fifteen surrealist oil paintings at the Santa Barbara Museum of Art, Santa Barbara, California.
November 14: Arnold Rönnebeck dies of throat cancer in Denver, Colorado.
He is buried, along with his wife, Louise Harrington Emerson (1901-1980), at Thompson Memorial Cemetery, New Hope, Bucks County, Pennsylvania.