■ “Speaking Layers,” featuring new paintings by Observatory Circle artist Lindsay Mullen, will open Friday with a reception from 6 to 8 p.m. at Susan Calloway Fine Arts. On view through April 29, the post-impressionist works are inspired by time, light and experience. Located at 1643 Wisconsin Ave. NW, the gallery is open Tuesday through Saturday from 10 a.m. to 6 p.m. 202-965-4601.
■ The Washington Project for the Arts will hold its 36th annual auction gala Saturday from 7 to 11 p.m. at the Uline Arena, 1140 3rd St. NE. Tickets to the auction gala start at $325 and can be purchased by visiting the group’s website, wpadc.org.
■ “Advertising War,” featuring poster imagery created before and during World War I to promote the war effort, opened recently at the National Museum of American History and will continue through Oct. 1. Located at 14th Street and Constitution Avenue NW, the museum is open daily from 10 a.m. to 5:30 p.m. 202-633-1000.
■ The National Portrait Gallery recently announced it has temporarily installed its “America’s Presidents” exhibit in the west gallery on the second floor while its regular space is being refurbished, a process that will continue through Sept. 4. The temporary installation includes Chuck Close’s portrait of former President Barack Obama, on view for the first time. Located at 8th and F streets NW, the gallery is open daily from 11:30 a.m. to 7 p.m. 202-633-1000.