The painter, together with "Vladimir", was one of the masters of Saint Petersburg, and belonged to the well known "Group of eight". The exhibited works of Koshelkov are to be ascribed to the world context of art, as in them we can find, at a very high level, the intersection of the most important art's tendencies. His works offer us, from one hand, an original synthesis of impressionism and abstractism, and from the other hand – especially in the drawings – of realistic figurativism and naпve ways of representing old scenes of everyday Russian life. The outcome of this articulated matrix of style, give us the impression that the realistic data always contain something that is not taken from reality, but goes beyond it. Koshelkov's paintings and drawings put in dialogue, one with each other, the world of real, sensible experience, and the world of imagination, which the same real and sensible experience seems to disclose. His strong and material brush serves to the representation of the full significance of a single moment in life, which nevertheless involves different tones and aspects, nuances and shades. Koshelkov reached this result adopting a technique, of which he was a master: the chiaroscuro. Light and dark can never be separated from each other, as in this world there is no simple and contradiction-free idea of purity. Every purity has a body, and every body has a shade. The artist tells us that also our most abstract constructions – like geometrical figures – have a concrete characteristic, as they are somehow living entities, which live at least in our minds.