Over centuries, the Mystery Schools spread into Greece and thence into Rome. During the Middle Ages, they were allegedly concealed under various names. AMORC claims that Rosicrucianism is mentioned as far back as 1115 CE in a book of the collection of Brother Omnis Moriar in Germany. However, no other record of such a brother or book has appeared. The alleged name probably derives from the opening words of Horace in Ode 3.30, in which he writes: "Non Omnis Moriar" ("I shall not completely die").