Maridon Museum, 322 N. McKean St., presents a display called "Jade: Stone of Heaven" plus a separate exhibit of white elephants and other ivory pieces in addition to the permanent collection. 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 "A Map of Latin American Dreams," featuring 18 black-and-white portraits by Fellowship 2008 award recipient Martin Weber, through March 7. Weber's social documentary photographs use the words and handwriting on blackboards to portray individuals as anchored to their own narratives. Also, 10 honorable mention photographers are exhibiting one piece each. Regular gallery hours are noon to 6 p.m. Wednesdays, Thursdays and Fridays and 11 a.m. to 5 p.m. Saturdays. Call 412-431-1810. Admission is free. Call 412-431-1810.<B>Carnegie Museum of Art</B>, 4400 Forbes Ave., is showing the architectural etchings and engravings of "Giovanni Battista Piranesi: Architecture and the Spaces of the Imagination" through Feb. 15. 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>Mattress Factory, </B>500 Sampsonia Way, is showing "Predrive: After Technology" through April 5. Call 412-231-3169.

<B>Hoyt Institute of Fine Arts</B>, 124 E. Leasure Ave., New Castle, is featuring the work of James R. Stewart of Fredonia, a 2007 Guggenheim Fellowship recipient in painting, through Feb. 28. 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.