The Grand Lodge of Pennsylvania, officially The Right Worshipful Grand Lodge of the Most Ancient and Honorable Fraternity of Free and Accepted Masons of Pennsylvania and Masonic Jurisdictions Thereunto Belonging, sometimes referred to as Freemasons of Pennsylvania, is the premier masonic organization in the Commonwealth of Pennsylvania. The Grand Lodge claims to be the oldest in the United States, and the third-oldest in the world after England and Ireland, having been originally established as the Provincial Grand Lodge of Pennsylvania in 1731. This claim is disputed by both the Grand Lodge of Massachusetts and the Grand Lodge of Virginia.

Freemasonry or Masonry refers to fraternal organisations that trace their origins to the local guilds of stonemasons that, from the end of the 14th century, regulated the qualifications of stonemasons and their interaction with authorities and clients. Many Freemasons trace the roots of the craft further back in history, accepting the Knights Templar as the conduit between the ancient mysteries and the beginnings of operative and speculative Freemasonry. see: “The Way of the Templar” by Masonic historian, 33° Timothy Hogan. Modern Freemasonry broadly consists of two main recognition groups: Regular Freemasonry, which insists that a volume of scripture be open in a working lodge, that every member professes belief in a Supreme Being, that no women be admitted, and that the discussion of religion and politics do not take place within the lodge; and Continental Freemasonry, which consists of the jurisdictions that have removed some, or all, of these restrictions.