SRU will pay homage to the life of the late Rev. Martin Luther King Jr. with a lecture at 4 p.m. Jan. 21 by Todd Allen, associate professor of communication at Geneva College, in SRU's University Union.

Holidays tours of the Nationality Rooms in the Cathedral of Learning, 4200 Fifth Ave., Oakland, conclude Friday.Self tours are available without reservations from 9 a.m. to 2:30 p.m. today and Friday.Admission is $3 for adults and $1 for youths ages 8 to 18. Call 412-624-6000.

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.