"The Mathematicall Praeface to Elements of Geometrie of Euclid of Megara" is a work of the famous English mathematician John Dee, which is a jubilee edition that presents the introduction to "Elements of Geometry" by Euclid. The author examines the mathematical principles that underlie geometry and are used to prove axioms and theorems of classical geometry. Dee advocates the idea of mathematical precision and evidential reliability, which contributed to the further development of mathematics as a science. This book is an important source for the study of the history of mathematics and reflects the importance of Euclid's work for the development of geometry.