COUNTYMaridon 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. Admission is $4 for adults, $3 for senior citizens and students, and free for children younger than 8 accompanied by an adult. Call 724-282-0123 or visit maridon.org.

PITTSBURGHCarnegie Museum of Art, 4400 Forbes Ave., presents “Strength in Numbers: Photography in Groups.” 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. Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children 3 to 18. Visit www.cmoa.org.