There are many Masonic and Masonic-related orders or organizations in which membership is predicated, to varying extent, upon membership in a Masonic lodge. Included are such well-known bodies as the Scottish Rite, the York Rite, the Shrine, the Eastern Star, and many others.
The Blue Lodge is recognized as the root and foundation of all Freemasonry. Once a man has received the three symbolic degrees in a Blue Lodge, thus becoming a Master Mason, he is often invited to become a member in one or more of the appendant orders. Many Master Masons accept these invitations and eventually become quite active in various areas of Freemasonry, being constantly reminded all along the way that they must remain faithful to their blue lodges.