The Liber Memorialis is an ancient book in Latin featuring an extremely concise summary—a kind of index—of universal history from earliest times to the reign of Trajan. It was written by Lucius Ampelius, who was possibly a tutor or schoolmaster.
The book is dedicated to a Macrinus, who may have been the emperor who reigned 217–218, but that name was not uncommon, and it seems more likely he was simply a young man with a thirst for universal knowledge, which the book was compiled to satisfy.
The book's object and scope are indicated in its dedication:
Since you desire to know everything, I have written this 'book of notes,' that you may learn of what the universe and its elements consist, what the world contains, and what the human race has done.
The Liber Memorialis seems to have been intended as a textbook to be learned by heart. This little work, in fifty chapters, gives a sketch of cosmography, geography, mythology (Chapters I-X), and history (C