The paper examines the significant relationship the history of philosophy a
nd the systematic form of philosophizing in the 19th and 20th centuries as
developed in the conceptions of G.W.F. Hegel and M. Heidegger. The first pa
rt discusses the essential models of the philosophy of the history of philo
sophy illustrated by Hegel's conception of the history of philosophy and it
s relationship to the systematic form of his philosophy. Hegel's philosophy
of the history of philosophy as philosophizing about philosophy is a metat
heoretical movement inside historical-philosophical thinking, the aim of wh
ich is not to describe the process of the history of philosophy from the ou
tside, but to understand it and to explain it as an inseparable part of the
resolution of the most important philosophical problems. The second part o
f the contribution focuses mainly on Heidegger's question What it is-philos
ophy?, as well as on his later writings, which offer a remarkable picture o
f the unity of philosophy and the history of philosophy.