COUNTY

Maridon Museum, 322 N. McKean St., is hosting a temporary exhibit sponsored by the Kai family through April 23. Regular 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.

Butler County Historical Society at the Senator Walter Lowrie House Museum, 123 W. Diamond St., can be reached at 724-283-8116 or www.butlerhistory.com.

Zelienople Historical Society is sponsoring an EMA/Ameritours trip to Washington, D.C., featuring visits to the Holocaust Museum and the Bible Museum and sightseeing on May 11 and 12. Email info@ameritours.com for cost information.

Harmony Museum, 218 Mercer St., Harmony, has tours that include the 1809 main museum building and wine cellar and a neighboring early 19th century house, both built by the communal Harmony Society, and a Mennonite log house, offered from 1 to 4 p.m. daily, except when the museum is closed Mondays and major holidays. Admission is $7 for adults, $6 for senior citizens age 60 and older, and $3 for youths ages 6 to 17. Call 724-452-7341.

PITTSBURGH

Heinz History Center, 1212 Smallman St., will host Irish genealogy experts from the Ulster Historical Foundation in Belfast on Sunday to present an in-depth Irish Genealogy Workshop. For cost information and required registration, call 412-454-6000 or visit www.heinzhistorycenter.org.