A Masonic lodge (also called Freemasons' lodge, or private lodge or constituent lodge) is the basic organisational unit of Freemasonry. It is also a commonly used term for a building where Freemasons meet and hold their meetings. Every new lodge must be warranted or chartered by a Grand Lodge, but is subject to its direction only by enforcing the published constitution of the jurisdiction. By exception, the three surviving lodges that formed the world's first known grand lodge in London (now merged into the United Grand Lodge of England) have the unique privilege to operate as time immemorial, i.e., without such warrant; only one other lodge operates without a warrant – the Grand Stewards' Lodge in London, although it is not entitled to the "time immemorial" status.
A Freemason is generally entitled to visit any lodge in any jurisdiction (i.e., under any Grand Lodge) in amity (recognition of mutual status) with his own Grand Lodge. In some jurisdictions, this privilege is restricted to Master Masons (that is, Freemasons who have attained the Order's third degree). He is first usually required to check, and certify, the regularity of the relationship of the Lodge – and be able to satisfy that Lodge of his legality of membership. Freemasons gather together as a Lodge to confer (also known by the term "work") the three basic Degrees of Entered Apprentice, Fellowcraft, and Master Mason.
