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 at 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 with ID 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,” in which patrons can share photographs at ohsnap.cmoa.org. 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 with ID and children ages 3 to 18, and free for children younger than 3. Call 412-622-3131 or visit www.cmoa.org.Silver Eye Center for Photography, 1015 E. Carson St., hosts an exhibit of works by Diane Meyer of Santa Monica, Calif., and Ross Mantle of Pittsburgh, the winners of the Fellowship 13 International Photography Competition. Admission is free. Hours are noon to 6 p.m. Tuesdays through Saturdays. Call 412-431-1810 or visit www.silvereye.org.