Mark Your Calendar!! Tuesday, September 11 @ 6:30 PM - Cathedral of Saint Catherine of Siena, 18th & Turner Streets, Allentown. The Most Reverend Alfred Schlert, Bishop of Allentown invites all Police, Firefighters, First Responders, Legal Professionals, Health Care Workers and their families as we celebrate a Mass of Thanksgiving. Please wear your uniform. Reception to follow in the Parish Activities Center. RSVP: firstname.lastname@example.org.