The Art Center, 344 S. Main St., has an extended deadline until April 15 for the art entries for the "Green Show." Opening night remains April 17. Extended hours for "Inspirational Religious Art" will be from 1 to 4 p.m. Easter Sunday. Regular gallery hours are noon to 6 p.m. Wednesdays and Thursdays, noon to 9 p.m. Fridays, and noon to 4 p.m. Saturdays. The Art Center admission is free. Call 724-283-6922 or visit www.butlerartcenter.net.

Bottlebrush Gallery & Shop, 539 Main St., Harmony,

will have a

six-week course in watercolor painting from 6 to 8 p.m. Mondays April 13, 20 and 27 and May 4 and 11. Cost is $120, and the students are to take their own supplies. Call 724-452-0539 or visit the Web site, www.bottlebrushgallery.com

Maridon Museum, 322 N. McKean St., regularly has hundreds of pieces of ancient and contemporary Asian art as well as Meissen porcelain on display. 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 objects relating to China and Japan. Call 724-282-0123.

<B>Silver Eye Center for Photography</B>, 1015 E. Carson St., presents "The Analytical Eye," a retrospective featuring 50 photographs by Pittsburgh artist Aaronel deRoy Bruber whose images range from panoramas of landscapes to industrial views of steel mills, through June 27. Gallery hours are noon to 6 p.m. Wednesdays through Fridays, and 11 a.m. to 5 p.m. Saturdays. Call 412-431-1810 or visit the Web site, www.silvereye.org.<B>Andy Warhol Museum</B>, 117 Sandusky St., is exhibiting "The Vader Project," an exhibition examining the iconic "Star Wars" villain through the eyes of 100 international pop surrealist and underground contemporary artists from around the world, through May 3. Hours are 10 a.m. to 5 p.m. Tuesdays through Sundays with extended hours until 10 p.m. Fridays; closed Mondays. Admission is $15 for adults, $9 for senior citizens, and $8 for children. Call 412-237-8300 or visit the Web site, www.warhol.org.<B>Carnegie Museum of Art</B>, 4400 Forbes Ave., hosts "Opera for a Small Room," a collaboration between acclaimed contemporary artists Janet Cardiff and George Bures Miller, through July 19. The exhibit introduces visitors to the quirky world of an imaginary man named R. Dennehy, the owner of a collection of opera records that the artists purchased at a second-hand store in a small town in British Columbia. 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. Closed 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, and free for members and children younger than 3. Call 412-622-3131 or visit the Web site, www.cmoa.org.

<B>Blue Heron Gallery</B>, 600 Main St., Volant, features fused glass and photos by Tiffany Wolfe, Mark Cappabianco and Douglas Michaels through April 26. An opening reception is planned for 2 to 4 p.m. Saturday. Call 724-652-0752.<B>Hoyt Institute of Fine Arts</B>, 124 E. Leasure Ave., New Castle, presents the exhibit "Lost in Form, Found in Line" through May 1. Tours, curriculum and lesson plans are free to educators by contacting Bob Presnar at Ext. 13. Admission is free. New gallery hours are 11 a.m. to 8 p.m. Tuesdays and Thursdays and 11 a.m. to 4 p.m. Wednesdays, Fridays and Saturdays. Call 724-652-2882, or visit the Web site, www.hoytartcenter.