As an artist he was very versatile, his work includes paintings, graphics, sculptures, monumental paintings and a special chapter are realizations for architecture. In painting he focused on still life and landscape, intimate mood themes, portraits and figural compositions, in which he sought a connection between modern art and traditional values. His knowledge of the work of Édouard Manet had a major influence on his work and he was also inspired by old Czech portrait painting, literature and expressionism.
From the end of the 1950s Wiesner stayed in the quiet still life of the Orlické Mountains, in the village Říčky, which became his second home. It was here that the painting from the OGV collections in Jihlava, "Summer Evening in Říčky" was created, which is a testament especially to the painter's refined sense of colour, which became for him the basic means of expression for capturing the intimate mood in the simple motif of evening works in the garden. He created an expressive composition in rich dark colours, dominated mainly by shades of black, blue and gree