COUNTY

Maridon Museum, 322 N. McKean St., will start another season of “The Collectors” on Sept. 15. Gallery hours are 11 a.m. to 4 p.m. Wednesdays through Saturdays, except holidays. Admission is $4 for adults, $3 for senior citizens and students, and free for children younger than 8 accompanied by an adult. Guided tours are available with advanced notice for no extra charge. Call 724-282-0123 or visit maridon.org.

PITTSBURGH

Carnegie Museum of Art, 4400 Forbes Ave., presents “Strength in Numbers: Photography in Groups” through Feb. 6. Museum hours are 10 a.m. to 5 p.m. Mondays and Wednesdays through Saturdays with extended hours until 8 p.m. Thursdays, and from noon to 5 p.m. Sundays; closed Tuesdays and major holidays. Museum admission is $19.95 for adults, $14.95 for senior citizens age 65 and older, $11.95 for students with ID and children ages 3 to 18, and free for children younger than 3, and includes the Carnegie Museum of Natural History. Call 412-622-3131 or visit www.cmoa.org.