Associated Artists of Butler County continues the Invitational Art Show featuring more than 50 pieces of art by about 25 artists, including paintings, 3-D works and sculpture, through Saturday. The Underground Gallery at The Art Center presents its fifth Gothic Show. Gallery hours are noon to 6 p.m. Wednesdays through Fridays and noon to 4 p.m. Saturdays. Admission is free. Call 724-283-6922 or visit www.aabcArtCenter.com.

Maridon Museum, 322 N. McKean St., is open 11 a.m. to 4 p.m. Wednesdays through Saturdays. Admission is $4 for adults, $3 for senior citizens and students, and free for children younger than 8. Guided tours are available with advanced notice for no extra charge. Call 724-282-0123 or visit www.maridon.org.

Andy Warhol Museum is showing “Regarding Warhol: Sixty Artists, Fifty Years” through April 28. Hours are 10 a.m. to 5 p.m. Tuesdays through Sundays with extended hours until 10 p.m. Fridays. Admission is $20 for adults, $10 for students and children ages 3 to 18. Admission is half price from 5 to 10 p.m. Fridays. Call 412-237-8300 or visit www.warhol.org.Carnegie Museum of Art, 4400 Forbes Ave., is displaying “20/20: Celebrating Two Decades of the Heinz Architectural Center” through May 19 and “Oh Snap! Your Take on Our Photographs.” Hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays, with additional hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Admission is $17.95 for adults, $14.95 for senior citizens, $11.95 for students and children ages 3 to 18, and free for children younger than 3. Call 412-622-3131 or visit www.cmoa.org.