Associated Artists of Butler County at the Art Center, 344 S. Main St., hosts the 74th annual Spring Show through May 30. In the Members Gallery is "Nature's Palette" by Mary Kostolansky, and in the Mezzanine Gallery, "The Power of Place: Americans on Vacation" by Christine Holtz. A call for artists for a "Futuristic Art" exhibit continues through May 30, with the show running from June 13 to July 11. The Art Center is open noon to 6 p.m. Wednesdays and Thursdays, noon to 9 p.m. Fridays and noon to 4 p.m. Saturdays. Admission is free. Call 724-283-6922 or visit the Web site, www.butlerartcenter.net.

Maridon Museum, 322 N. McKean St., features a new display of 19 Japanese samurai dolls. The museum displays hundreds of pieces of ancient and contemporary Asian art as well as Meissen porcelain. Regular museum hours are 11 a.m. to 5 p.m. Tuesdays through Saturdays and noon to 5 p.m. Sundays; closed Mondays and holidays. Admission is $4 for adults, $3 for senior citizens and students, and free for children younger than 8; children must be accompanied by an adult. Tours are led by trained docents and are available with advance notice. The museum also has a gift shop specializing in gifts and decorative art objects relating to China and Japan. Call 724-282-0123.

<B>Waterworks 2008,</B> the Pittsburgh Watercolor Society's annual member show, is on display through May 31 at the 3rd Street Gallery, 220 Third St. in the Carnegie section of Pittsburgh. The show is coordinated by Maria Kovalenko Leysens of Adams Township, who also has the painting "To Remember" in the show. Her watercolor won an honorable mention. Gallery hours are from 11 a.m. to 4 p.m. Wednesdays through Saturdays. Call 412-276-5233 or visit, www.3rdstreetgallery.net.<B>Carnegie Museum of Art</B>, 4400 Forbes Ave., continues "Life on Mars, the 2008 Carnegie International" through Jan. 11, 2009. The exhibit features 40 emerging and established artists from 17 countries. Regular hours are 10 a.m. to 5 p.m. Tuesdays through Sundays; closed Mondays and major holidays. Admission, which includes the Carnegie Museum of Natural History, is $15 for adults, $12 for senior citizens, and $11 for students and children age 3 and older. Call 412-622-3131 or visit the Web site, www.cmoa.org.<B>North Hills Art Center</B>, 3432 Babcock Blvd. in Ross Township, is hosting Regional 2008, a multimedia, juried exhibit, through June 8. Admission and parking are free. Regular gallery hours are 11 a.m. to 4 p.m. Mondays through Saturdays; closed Sundays. Call 412-364-3622.<B>Frick Art and Historical Center</B>, 7227 Reynolds St. in the Point Breeze section of Pittsburgh, is showing "Craig McPherson: Pittsburgh Drawings" through June 8. The Frick Art Museum is open 10 a.m. to 5 p.m. Tuesdays through Sundays; closed Mondays and holidays. Admission is free; docent-led tours are $5 each. Call 412-371-0600.<B>Andy Warhol Museum</B>, 117 Sandusky St., presents "Piet (Mondrian) in Pittsburgh" through Aug. 31, featuring 24 abstract paintings by the Dutch artist best known for his representations of rigid forms consisting of rectangular shapes of red, yellow, blue, or black, separated by thick, black, rectilinear lines. Hours are 10 a.m. to 5 p.m. Tuesdays, Wednesdays and Thursdays,10 a.m. to 10 p.m. Fridays, and 10 a.m. to 5 p.m. Saturdays and Sundays; closed Mondays. Admission is $15 for adults, $9 for senior citizens, $8 for children and students. Admission is half-price from 5 to 10 p.m. Fridays. Call 412-237-8300 or visit the Web site, www.warhol.org.

<B>Hoyt Institute of Fine Arts</B>, 124 E. Leasure Ave., New Castle, presents its 35th Regional Juried Exhibition with 72 works from 50 artists through Friday. Alongside the 35th Hoyt Regional, the Sunroom Gallery contains an exhibition of works from Slippery Rock University's Art Seminar Class, featuring paintings, ceramics, photography, printmaking, digital media and metals. And featured in the Blair Sculpture Walkway gallery is the New Castle Camera Club's annual juried photography exhibition. The club has more than 65 members, including some from Butler. Admission is free. Gallery hours are 10 a.m. to 8 p.m. Tuesdays and Thursdays and 10 a.m. to 5 p.m. Wednesdays, Fridays and Saturdays. Call 724-652-2882, or visit the Web site, www.hoytartcenter.