Learn more about Allegheny County Law Library — the only public law library in Allegheny County, serving the community for over 150 years. Order law books and legal volumes online from Law Catalog including exclusive content law.This document available, as a public service, to support you in making important decisions to record your wishes for end of life healthcare. The Allegheny County Law Library in Downtown Pittsburgh serves the public and the legal community 5 days a week, Mon - Fri. We accept for filing and maintain legal documents for Allegheny County Orphans' Court. We issue marriage licenses and accept passport applications. If you are looking to share your passion for the library, you can become an advocate. Send an email, make a phone call, attend a monthly municipal meeting. The majority of the people featured in the book studied at Pitt or went to law school there. Also, you do not need an attorney in a Magisterial District Court; in Common Pleas Court it is wise to have an attorney.