Anglo-American Freemasonry (also self-described as Regular Freemasonry[1][2]) is a loose network of overlapping chains of mutually recognized Grand Lodges, forming a Regular Masonic jurisdiction.[3][4][5] For the most part these trace their descent from one of "original" British Grand Lodges, with mutual recognition based on adherence to certain core values, rules and membership requirements (known as Landmarks).[6]