This paper attempts to acquaint Polish readers with the Russian Orthodox philosopher Pavel Florensky’s (1882–1937) thinking on the category of space‑ness, which together with the categories of symbolism and light is one of the key‑words in his theory of aesthetics. The concept of space is, according to Florensky, a criterion for distinguishing art types, although for him it is only a model, which can be used to help form judgments about the world. It is also the basis of being for the artwork itself. Painting and printmaking, among other arts types mentioned by Florensky (poetry, music, theatre, and architecture), have their own particularities in their organization of space. Painting and printmaking are, for Florensky, the truest art forms — art par excellence. The presentation of a threefold interpretation of the category of space‑ness, together with the description and justification of the divisions which are made in art based on these spatial categories by the philosopher is the leitmotiv of this paper. The aim of the paper is to present and discuss the opinions and arguments of the Orthodox thinker from his work Анализ пространственности (и времени) в художественно‑изобразительных произведениях, which has not yet been translated into Polish or English.