The Associated Artists of Butler County group is showing its 76th annual Nature & Wildlife exhibit through Oct. 8 at The Art Center, 344 S. Main St. Other upcoming events include: "Art of Horror V" opening at 6 p.m. Oct. 15, "Butler County Art & Artists" opening Oct. 22 (admission $35), and the annual Holiday Show & Sale running Dec. 3 to 31. Art classes in a variety of media including painting, sculpture and jewelry-making are available at The Art Center for $5 an hour. Call 724-283-6922.

Maridon Museum, 322 N. McKean St., is hosting the author and photographer of "Pennsylvania Crude: Boomtowns and Oil Barons" for a book signing tonight from 6 to 9 p.m. Paul Adomites and Ed Bernik will talk about the making of this book that highlights the Butler County region. Refreshments will be served. Call 724-234-4619 or 724-282-0123.

Saxonburg Area Artists Co-op, 215 Main St. rear in Saxonburg, is the site of "Setting the Table: Contemporary Ceramics Dines In," contemporary ceramics by Western Pennsylvania potters, through Saturday. Regular gallery hours are 6 to 9 p.m. Thursdays, 1 to 9 p.m. Fridays, 10 a.m. to 2:30 p.m. Saturdays and by appointment. Call 412-260-5779 or 412-849-4648.

Bottlebrush Gallery, 539 Main St., Harmony, presents June Kielty's "Expressions in Wax and Dye" through Oct. 10. Gallery hours are 11 a.m. to 7 p.m. Wednesdays, Thursdays and Fridays, 10 a.m. to 5 p.m. Saturdays, and noon to 5 p.m. Sundays. Call 724-452-0539 or visit www.bottlebrushgallery.com.

<B>709 Penn Gallery</B>, 707 Penn Ave., presents "Nature in Glass: A Solo Exhibit of Work by Gary Guydosh" through Oct. 24. Gallery hours are 11 a.m. to 6 p.m. Wednesdays and Thursdays, 11 a.m. to 8 p.m. Fridays and Saturdays, and 11 a.m. to 5 p.m. Sundays. Admission is free. Call 412-456-6666 or visit www.pgharts.org.<B>Silver Eye Center for Photography,</B> 1015 E. Carson St., hosts "Spectra: New Abstract Photography" through Nov. 13. Gallery hours are noon to 6 p.m. Tuesdays through Saturdays. Admission is free. Call 412-431-1810 or visit www.silvereye.org.<B>Frick Art and Historical Center</B>, 7227 Reynolds St. in Point Breeze, hosts tours with the theme "Mourning Customs in the Victorian Era" through Oct. 31. Admission to the art museum is free as always; there is a fee for a tour of Clayton, the former home of Henry Clay Frick. Hours are 10 a.m. to 5 p.m. Tuesdays through Sundays; closed Mondays and major holidays. Call 412-371-0600.<B>Carnegie Museum of Art</B>, 4400 Forbes Ave., has opened "The Art of Structure" in the Heinz Architectural Center. "The Art of Structure" explores radical works of 20th-century engineering that are now in the canon of Modernist design. Regular 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. Regular admission, which includes the Carnegie Museum of Natural History, is $15 for adults, $12 for senior citizens age 65 and older, and $11 for students with ID and children age 3 to 18, and free for members and children younger than 3. Call 412-622-3131 or visit the website, www.cmoa.org.<B>Society for Contemporary Crafts</B>, 2100 Smallman St., is hosting "DIY: A Revolution in Handicrafts" in the main galleries through March 26. This major exhibition explores issues relating to environmentalism, social responsibility, politics, community and an appreciation for all things handmade. The show highlights works created by 15 artists from across the United States as well as Canada and England. Gallery hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays and by appointment Mondays; closed holidays. Call 412-261-7003.<B>Andy Warhol Museum</B>, 117 Sandusky St., presents "Marilyn Monroe: Life as a Legend" from Oct. 23 through Jan. 2. Museum hours are 10 a.m. to 5 p.m. Tuesdays through Sundays and open later until 10 p.m. Fridays. Admission is $15 for adults, $9 for senior citizens and $8 for students and children. Call 412-237-8300.

<B>Blue Heron Gallery</B>, 600 Main St., Volant, is showing "American Visions," a collection of representational paintings by Shirley Jean Dobler, from Friday through Oct. 30. An opening reception is planned for noon to 4 p.m. Saturday. The 2010 Student Art Show also will be featured. Gallery hours are 10 a.m. to 5 p.m. Wednesdays through Saturdays and noon to 5 p.m. Sundays, except holidays. Call 724-652-0752.