Structure of Freemasonry

The structure of Freemasonry begins with the "Blue Lodge." This is where a Mason goes through the first three degrees. Following that, there are two paths a Mason can take: The York Rite and The Scottish Rite.
A "rite" is defined as a ceremonial act or procedure and indeed, there are many ceremonies in both rites. The Scottish Rite is ancient and allows members of any religion. The York Rite, also known as the American Rite, is the Christian path of Masonry. Both rites are meant to expand a man's Masonic education and all members are welcome to go through both Rites. However, in order to join the Order of the Knights Templar, the final order of the York Rite, one must be a Christian.