Recently, the Law Library welcomed Ms. Jolande Goldberg, Law Classification Specialist at the Policy and Standards Division of the Library of Congress, as a guest lecturer for the Law Library’s Power Lunch series. A longtime employee of the Library of Congress, Jolande Goldberg is well known as the principle architect of the K schedule – the part of the Library of Congress’s Classification system that deals with law and law-related literature. Ms. Goldberg spoke on Renaissance traditions of visual aids in the study of law. Her lecture, “De Arte et De Jurisprudentia: Meditationes ad Res,” was a series of reflections on the origins and development of tree diagrams – called in Latin‘arbores’ – which were a form of visual representation that became the standard method of presenting information about degrees of family relation and their implications for personal status law throughout Europe for hundreds of years.