This book was born of a simple idea, based in turn on a conviction: Muhammad is indeed a prophet, the last of a series of Semitic prophets descended from Abraham. Therefore, there is necessarily evidence of the authenticity of his mission. The aim of this book is to make a non-exhaustive inventory of them, for, as the title indicates, we have contented ourselves with 100 proofs which, taken together, form a bundle of truths that only a narrow-minded person could reject.