Armory Arts Week is now in full swing, kicking off the international spring arts season with an array of fairs, events and parties around New York. Leading the headlines are the contemporary art attractions, but The Armory Show and The Art Show (both through March 8) also are offering up some notable masterworks of American Modernism.

High praise from the media has been showered on Armory Show director Noah Horowitz, 35, who has succesfully attracted more high-quality exhibitors, from emerging to blue-chip galleries. (Albeit, there are some complaints about a leaking roof.)

About 65,000 people are expected to attend the 17th edition of the Armory Show where contemporary art holds court at Pier 94 and modern art resides at Pier 92.

Altogether there are 199 galleries from 28 countries exhibiting, and 56 of those exhibitors are set up on Pier 92 with 20th-century offerings.

Of note, new exhibitor Debra Force Fine Art is showing the exhibition Line and Space: Architectural Themes in 20th-Century American Art, which features abstract and representational works by Romare Bearden, Oscar Bluemner, Charles Burchfield, Werner Drewes, Lyonel Feininger, Sam Francis, Robert Gwathmey, Grace Hartigan, Edward Hopper, Andrew Wyeth, and others.

Marsden Hartley is center stage at Driscoll Babcock Galleries and a presentation of The Blue Four at Moeller Fine Art includes works by Paul Klee and Lyonel Feininger. Highlights from Jonathan Boos LLC include works by George Morris, Milton Avery, Arthur Dove, Jacob Lawrence, Charles Sheeler, and more.

Realist and avant-garde traditions are represented by Hirschl & Adler Modern. Helen Frankenthaler, Frank Stella, Isamu Noguchi, and other modern artists are on view at the booth of Gerald Peters Gallery. Works by Sam Francis, Theodoros Stamos, Louise Bourgeois, Joseph Cornell, Hans Hofmann, Franz Kline, and many others are offered by Hollis Taggart Galleries.

DC Moore Gallery has fine examples by Romare Bearden, Milton Avery, Charles Burchfield, Jacob Lawrence, Willem de Kooning, Andrew Wyeth, Everett Shinn, and more.

American Modernism is a special highlight at ADAA's The Art Show, held at the Park Avenue Armory through March 8. Works on view include Whistler's groundbreaking watercolors at Thomas Colville Fine Art and ten paintings by Modernist icons—including George Bellows, Georgia O'Keeffe and Stuart Davis—at Menconi + Schoelkopf Fine Art.

Meredith Ward Fine Art charts the development of Modernism with John Marin watercolors originally owned by Alfred Stieglitz.

The fair also provides many opportunities to discover less-known but equally significant figures. Forum Gallery and Allan Stone Projects both look at the influence of John Graham—a mentor to Jackson Pollock, Willem de Kooning and Arshile Gorky. Hirschl & Adler Galleries highlights Winold Reiss' jazz-inspired depictions of Harlem alongside those of Romare Bearden and Stuart Davis.

Also on view are American Realist egg tempera paintings by the likes of Reginald Marsh at ACA Galleries and sculpture by Hiram Powers, Saint-Gaudens and others at Conner-Rosenkranz.

More fairs this week include: art on paper, Volta NY, Independent 2015, Pulse New York