De umbris idearum

De Umbris Idearum (Latin for "On the Shadows of Ideas") is a book written in 1582 by Italian Dominican friar and cosmological theorist Giordano Bruno. In this book, he proposes a system integrating mnemonics, Ficinian psychology, and hermetic magic. It is the first book he wrote covering the subject of memory, a topic on which he would focus the rest of his works.