The term Rosicrucian (symbol: the Rose Cross) describes a secret society of mystics, allegedly formed in late mediaeval Germany, holding a doctrine "built on esoteric truths of the ancient past", which, "concealed from the average man, provide insight into nature, the physical universe and the spiritual realm. " ^[1]

Between 1607 and 1616, two anonymous manifestos were published, first in Germany and later throughout Europe. ^[2]  These were Fama Fraternitatis RC (The Fame of the Brotherhood of RC) and Confessio Fraternitatis (The Confession of the Brotherhood of RC). The influence of these documents, presenting a "most laudable Order" of mystic-philosopher-doctors and promoting a "Universal Reformation of Mankind", gave rise to an enthusiasm called by its historian Dame Frances Yates the "Rosicrucian Enlightenment". ^[3]

In later centuries many esoteric societies have claimed to derive their doctrines, in whole or in part, from the original Rosicrucians. Several modern societies, which date the beginning of the Order to earlier centuries, have been formed for the study of Rosicrucianism and allied subjects.

Note: Esoterism had its beginnings long before Luther, but during the renaissance, the expansion of such mystical teachings became much more prevalent.