The Knights Templar, full name The United Religious, Military and Masonic Orders of the Temple and of St John of Jerusalem, Palestine, Rhodes and Malta, is a fraternal order affiliated with Freemasonry. Unlike the initial degrees conferred in a regular Masonic Lodge, which only require a belief in a Supreme Being regardless of religious affiliation, the Knights Templar is one of several additional Masonic Orders in which membership is open only to Freemasons who profess a belief in Christianity. One of the obligations entrants to the order are required to declare is to protect and defend the Christian faith. The word "United" in its full title indicates that more than one historical tradition and more than one actual order are jointly controlled within this system. The individual orders 'united' within this system are principally the Knights of the Temple, the Knights of Malta, the Knights of St Paul, and only within the York Rite, the Knights of the Red Cross.

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. 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.