It is named after the ground-breaking Principia Mathematica by Isaac Newton.
Krylov also published the first Russian translation of Isaac Newton, Philosophiæ Naturalis Principia Mathematica (1915).
The Martin Bodmer Library keeps a copy of the original edition that was owned by Leibniz.
Mathematica | Principia | Prodromus Systematis Naturalis Regni Vegetabilis | Principia College | Scripta Mathematica | Philosophiæ Naturalis Principia Mathematica | Naturalis | Principia Mathematica | The Principia | Principia Discordia | Ordo naturalis | Mathematica Policy Research | Historia naturalis palmarum | Historia Naturalis |
Isaac Newton's Philosophiæ Naturalis Principia Mathematica (Latin: "The Mathematical Principles of Natural Philosophy").