In this paper, I present the conjunction between a) a new history and philosophy of science, which, under the banner of a renewed historical epistemology, articulate a new relation between conceptual history and situated history; and b) new narratives in the history of philosophy that integrate women philosophers by showing the displacements this causes in terms of corpus, objects of research, and forms of writing. By questioning the philosophical canon, new focal points are brought to light.. Then I briefly present the tools of feminist epistemology as methodological instruments to, in act, proceed to these decenterings. I conclude with two examples from the Modern Age: Margaret Cavendish and Emilie du Châtelet. Until recently, these two women philosophers were mocked and little considered, but today they are part of the canon, have become mainstream in many Anglo-Saxon universities. I show how this shift changes the landscape of history and philosophy of science.