The steppe space in the prose of the new Ukrainian literature is investigated in the thesis of research. As a result, the research is regarded holistic concept of the topos steppe as a historiosophy concept and an aesthetical phenomenon. The relevant constructive space images are identified and analyzed. Their role in the works of T. Shevchenko, P. Myrniy, I.Nechui-Levitskiy, M. Kotsyubinskiy, Yu. Yanovsky, O. Gonchar and A. Syzonenko are determined. The genesis of literary reception of the Topos steppe throughout it's thematically varieties is studied for the first time in the Ukrainian literary critisizm. The author stresses that the geography of the Ukrainian Steppes in these writers' concepts always opens in the context of the historical destiny of the Ukrainian nation, in a wide historiosophy discourse, national and existential measurement. The notion of the steppe is analyzed on the diochronical level. An original elaboration of the theoretic concepts of "national image of the world" and "steppe" in its correlation with concepts "mentality", "world", "world outlook", "nation", "art historiosophy" etc. is a theoretic and methodological basis of the thesis. It is established that the evolution of the art image of the steppes was build on the line, with the trend to the distinct semantic varieties (step passed the status of alien / strange in the space of peace and mastered), complications of the art symbols and metaphors (to the traditional images "wide steppe" and "clear field" are added individual visions of the steppes). It determines an intensive condensation of the substance of the topics and existential and cultural discourse. The analyzed volume of artistic material gave the possibility to determine the main constant levels of the art reception of the topos steppe: a steppe chronotope (steppe as the palimpsest - "steppe - thickness of the ages"); steppe nature (beauty and poetry of a steppe landscapes); steppe as the space for studying human beings (there is one special type of the Ukrainian people which called steppe man). We point out that the childhood reception is one among the constructive elements of the art model of steppe. The child reception of the steppe is phenomenon which is analyzed in the in Y.Yanovsky's novel "Chilhood" ("Horseman"), in V. Blyznets's prose ("Canvases under Steppe"), in H.Tutunnuk's novels ("A Steppe fairy-tale", "A glow far away in the steppe"), in O. Honchar's novels ("Tronka", "Brigantine", "Your Star") etc. In the thesis the classification of the steppe chronotope is proposed. The art steppe chronotope can be explicit and real, dynamic (through images of the roads, way, search, escape etc.); mythical (in the form of artistic battle); idyllic; adventure; alien / fired on their; hospitable / mortal; nation, spring, summer, autumn, winter, a morning, day's, evening, night etc. These variants are integrated. Y.Yanovsky's novels open his neoromantic vision of the steppe. The author conception of this topos is based on the constant steppe images. The philosophy of active romanticism is relayed by such images as Sea, Space and Freedom. The special art form of Y.Yanovsky's vision of the steppe is "Ukrainian Texas". Different aspects of steppe (time-space, smell/sound/taste/visual images) are considered in details in the works of O. Honchar. Accent is made on the base of writer's specific world-outlook reception, which is consisting of his direction to the Earth (Steppe), Sky and Water (Ocean, Sea). In the work is proved that the reception of the steppe in Ukrainian prose was based for according to aesthetical and hystoriophofic principles. The writer's prose translates the specific way of national world outlook and national world image that is a result of the influence of the steppe. The paper focuses on analyse of the art historiosophy of the steppe in "Steppe" by O.Syzonenko. It is shown in the light of axiological values which are postulated in the author's historiosophy through the images Steppe and War. Steppe - one of the constructive toposes, which creates an integral image of the national world, reflected in the art literary texts.