Abstract: The article deals with Heidegger’s interpretation of antique ontology, in which Being was conceptualized in terms of production. What is this interpretation and why is it so important? Until recently, it has been difficult to answer these questions, since the texts in question have only in recent years become publicly available, and therefore have not yet been fully absorbed in Heideggerian-studies. Consequently, even the very useful works that cover the subject of production-theme in Heidegger focus more on the question of technique and do not consider the formation of this problematic, and therefore do not deal with it substantively. In the years 1921-1924, Heidegger was closely involved with Aristotle and lectured on his favorite philosopher for four years. It was during this period that he began to interpret Being in Aristotle as being-made, being-produced (das Hergestelltsein), and then extended this interpretation to the whole of ancient and medieval philosophy. This is a very remarkable moment in terms of methodology that characterizes Heidegger as a historian of philosophy. In this article, the author examines Heidegger’s interpretation of ancient ontology, revealing its weaknesses.

Abstract: The author believes that it is possible to discuss Heidegger's philosophy only in the light of a more or less clarified understanding of being, but this is precisely the main difficulty: Heidegger invites you on the road without saying where to go and what to guide you on the road. What should serve as a guideline to understand it correctly? From what preliminary understanding of being should we proceed when talking about fundamental ontology, ontotheology, ontological difference? First of all, my own being is for me a point of reference and a starting position in the comprehension of being and the construction of ontology. Therefore, the meaning of being is read not from the existing in general, but from the concrete existing, from itself. The being of Dasein – finite, because the existing one is mortal. However, the existence of a person is different from the existence of a number, a tree or an angel – how then to understand what meaning this word has? If being is time, and time is myself, then what is being a rock, a number, or God? In addition, Heidegger does not limit himself to the statement that God or an angel are given to consciousness, that is, given as certain entities, he says that they exist, that is, that entities are essences. This corresponds to the concept of "givenness" in phenomenology. At the same time, the datum can refer to anything, for example, to a unicorn and pegasus, Zeus and Hera, a round square and a wooden iron, but without considering them as something existing. Therefore, the question naturally arises about how Heidegger understands being after all, why does reality act as a synonym for being for him?

Abstract: The article examines some aspects of Brentano's ontology, starting with his 1862 dissertation "On the ambiguity of Being according to Aristotle", as well as its influence on the philosophy of M. Heidegger. The author shows that the ontology of the early Brentano is not limited to ousiology, since it includes a discussion of the field of mental being (ens rationis, ὂν ὡς ἀληθές) and it is in this aspect that he influences the young Heidegger. Following Aristotle, Brentano assigns a central role to the ontology of essence, which in the late period leads him to the position of reism, but in the lectures of the middle period Brentano discusses the problems of intentional inexistence, thanks to which projects of "new types of ontology" by Husserl and Mainong appear. The author believes that Heidegger was also influenced by these ideas. Of course, there are fundamental differences between the positions of Brentano and Heidegger, but the similarities are quite large. In particular, if Brentano, highlighting the real and true areas, gives preference in favor of the former, then Heidegger's ontology is built on the second member of this opposition. In particular, everything that can be given is called being by Heidegger, because we are talking about intentional being, about ens rationis, or ὂν ὡς ἀληθές