The Poor Fellow-Soldiers of Christ and of the Temple of Solomon (Latin: Pauperes commilitones Christi Templique Solomonici), commonly known as the Knights Templar or the Order of the Temple (French: Ordre du Temple or Templiers), were among the most famous of the Western Christian military orders.[3] The organization existed for approximately two centuries in the Middle Ages. It was founded in the aftermath of the First Crusade of 1096, with its original purpose to ensure the safety of the many Christians who made the pilgrimage to Jerusalem after its conquest.

Officially endorsed by the Roman Catholic Church around 1129, the Order became a favored charity throughout Christendom, and grew rapidly in membership and power. Templar knights, in their distinctive white mantles with red cross, were among the most skilled fighting units of the Crusades.Non-combatant members of the Order managed a large economic infrastructure throughout Christendom, innovating financial techniques that were an early form of banking,[5][6] and building many fortifications across Europe and the Holy Land.

The Templars' existence was tied closely to the Crusades; when the Holy Land was lost, support for the Order faded. Rumors about the Templars' secret initiation ceremony created mistrust, and King Philip IV of France, deeply in debt to the Order, took advantage of the situation. In 1307, many of the Order's members in France were arrested, tortured into giving false confessions, and then burned at the stake.[7] Under pressure from King Philip, Pope Clement V disbanded the Order in 1312. The abrupt disappearance of a major part of the European infrastructure gave rise to speculation and legends, which have kept the "Templar" name alive into the modern day.

Freemasonry is a fraternal organisation that arose from obscure origins in the late 16th to early 17th century. Freemasonry now exists in various forms all over the world, with a membership estimated at around 5 million (including around 480,000 in England, Scotland and Ireland alone, and just under two million in the United States).[1][2] The various forms all share moral and metaphysical ideals, which include, in most cases, a constitutional declaration of belief in a Supreme Being.

The fraternity is administratively organised into Grand Lodges (or sometimes Orients), each of which governs its own jurisdiction, which consists of subordinate (or constituent) Lodges. Grand Lodges recognise each other through a process of landmarks and regularity. There are also appendant bodies, which are organisations related to the main branch of Freemasonry, but with their own independent administration.

Freemasonry uses the metaphors of operative stonemasons' tools and implements, against the allegorical backdrop of the building of King Solomon's Temple, to convey what has been described by both Masons and critics as "a system of morality veiled in allegory and illustrated by symbols.

Martinism is a form of mystical or esoteric Christianity, which envisions the figure of Christ as "The Repairer" who enables individuals to attain an idealised state such as that in the Garden of Eden before the Fall. As an informal practice, Martinism dates back to late 18th Century France. In the late 19th Century it was established in France and elsewhere as a formal order meeting in lodges. During the 20th century there has also been a revival of some of the practices which pre-date Martinism proper and which directly inspired it.