Maridon Museum, 322 N. McKean St., is open 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. Tours are available with advance notice. Call 724-282-0123 or visit www.maridon.org.

Bottlebrush: A Gallery for the Arts, 539 Main St., Harmony, hosts an opening reception for the St. Stephen's Lutheran Academy, Zelienople, student exhibit from 7 to 9 p.m. today. The show continues through May 16. Admission to the exhibit is free. A concert featuring Malcolm Holcombe playing acoustic country, blues and Americana is set for 7 to 10 p.m. Friday; cost is $10. Make required reservations by calling 724-452-0539.

<B>Carnegie Museum of Art</B>, 4400 Forbes Ave., presents the first American museum exhibition by artist-filmmaker Duncan Campbell, an artist based in Glasgow, Ireland. A May Day celebration for seniors is planned for 11 a.m. to 2 p.m. Monday. “Impressionism in a New Light: From Monet to Stieglitz” will be on view May 12 to Aug. 26. Museum 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. Admission is $15 for adults, $12 for senior citizens, $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 www.cmoa.org.<B>Society for Contemporary Craft</B>, 2100 Smallman St., hosts an exhibition of enamel jewelry by Alexandra Raphael through June 30. “Transformation 8: Contemporary Works in Small Metals,” a biennial show featuring the work of 33 metalsmiths, continues through June 30. Gallery hours are 10 a.m. to 5 p.m. Mondays through Saturdays. Call 412-261-7003.<B>Andy Warhol Museum</B>, 117 Sandusky St., presents “Warhol and Cars: American Icons” through May 13. Hours are 10 a.m. to 5 p.m. Tuesdays through Sundays with extended hours until 10 p.m. Fridays. Admission is $15 for adults, $9 for senior citizens and $8 for students and children.<B><I><U></B></U></I>