The Performing Arts Series at Butler County Community College continues with the Pittsburgh Philharmonic performing "Unsolved Mysteries: Vienna" at 8 p.m. Friday in the college's Succop Theater.

Tickets are $18 in advance or $22 at the door; students pay $10. Call 724-284-8505 or visit the Web site, www.bc3.edu.

The university is celebrating its eighth annual Hispanic and Latino Month with the salsa band Azucar playing Afro-Columbiana music from 9 p.m. to midnight Friday in Carruth Rizza Hall.Antonio Cortijo from the University of California, Santa Barbara, will lecture on witchcraft in the Hispanic world at 4 p.m. Monday in the Russell Wright Alumni House and Conference Center.All events are free.

The 19th annual Slovak Heritage Festival, featuring song and dance performances. lectures and food vendors, will be held from 1 to 5 p.m. Sunday in the University of Pittsburgh Cathedral of Learning, 4200 Fifth Ave. in Oakland. Admission is free.

The Miller Gallery at CMU hosts "Experimental Geography," an exhibition by 19 artists and teams from seven countries, through Jan. 31.Admission to the gallery in the Purnell Center for the Arts on campus is free. Hours are noon to 6 p.m. Tuesdays through Sundays. Call 412-268-3618 or visit the Web site, www.cmu.edu/millergallery.

The Geneva College Theatre will open its 2009-10 season in the Studio Theatre with three short plays of suspense and terror by Lucille Fletcher being staged at 8 p.m. today, Friday and Saturday and Nov. 5 to 7 plus matinees at 2 p.m. Saturday and Nov. 7.Tickets are $5 for general admission, $3 for Geneva students and senior citizens, and $2 for children younger than 12. Call 724-847-5099.

Westminster College's Celebrity Series for Kids will present Enchantment Theatre Company's stage adaptation of "The Adventures of Harold and the Purple Crayon" at 7 p.m. Nov. 5 in Orr Auditorium on campus.The touring production, suitable for children ages 3 to 8, features life-size puppets, masked actors, magic, music, and large-scale animation.Tickets are $8 for children and $13 for adults and are available by calling 724-946-7354.

"Henry Koerner's Pittsburgh" continues through Nov. 12 in the Chatham University Art Gallery. The exhibit highlights Koerner's tenure at the Pennsylvania College for Women (now Chatham University) as "Artist in Residence" from 1952 to 1953, as well as the loss of his parents and brother during the Holocaust.The gallery is open from 11 a.m. to 5 p.m. Mondays through Fridays. Admission is free. Call 412-365-1232.