"The Newest Antiques," a Feb. 23 seminar with the Smithsonian Associates, takes an in-depth look at modernism and 20th-century American furniture. From 10 a.m. to 5 p.m., join author Oscar Fitzgerald ("Four Centuries of American Furniture," Wallace- Homestead, $24.95) as he traces major design movements including art nouveau, Arts and Crafts and Mission style, and discusses leading designers, European influences and other elements throughout the century. Location announced with reservation. Fee: $120. 202-357- 3030. www.smithsonianassociates.org . . . Baltimore's Cone Collection is the topic of a gallery talk today at the Baltimore Museum of Art. At 1 p.m., learn about two sisters whose lives, tastes and friends led to a world-class collection of fine and decorative arts. On Wednesday through May 12, see their Japanese wood-block prints on display for the first time in 50 years. 10 Ar...

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