[Тютчев]

In 1920-1921 he taught at the Higher workshops of arts and crafts (formerly School of Technical Drawing of Baron Alexander Stieglitz). In 1923 he moved to Moscow. In 1923-1927 he taught at the Faculty of graphic VKhUTEMAS (from 1924 - professor), and in 1927-1930 - VHUTEINa. In the 1924-1925 term and the exponential association "Makovets", in 1925-1926 - "4 Art. In the 1930's while he taught at several institutions: in 1930-1933 - at the Moscow Textile Institute, in 1931-1938 - at the Moscow Institute of Fine Arts, in 1935-1938 - at the Moscow Polygraphic Institute. In 1935-1938 also led the studio of monumental painting at the Moscow Architectural Institute. Summer months in the 1920's - 1930's carried out in Optina Kaluga. These visits were for Bruni, an extremely fruitful in the creative respect: it was there was done much of the drawings and watercolors 1920 - 1930.

And he Bruni moved to Moscow at the invitation of V. Favorsky. With family went to Optina desert and lived there for a long time. It is in the 20 years in Optinoj artist creates his best stuff.
In his works, nothing happens, or rather, is the most important thing: they bend under the weight of wet snow, the first trees that glisten just washed with rain, the roof, the sunlight penetrates the forest thicket ... All are one, well, animation and brittle. This fragility and impermanence simply require that to be etched. The artist responds to a silent demand.
It operates continuously, life and art to it are tangled, twisted. Creativity highest test becomes part of everyday life, should be, because he was a carefree attitude to Mozart's already completed their work and their future.

The flowering of creativity Lev Bruni accounts for 1920 - 30-ies. He actively participates in exhibitions. Especially striking and significant in such iconic as "Makovets" and "4 Arts", which establishes the continuity of artistic tradition and the high professional quality of work - are the main goals and objectives, which Bruni followed all his life. In whatever genre it acted - in painting, drawing, book illustration, in the monumental and decorative art.

Starting as a painter, Lev Bruni finally comes mainly to watercolors and drawing as the most suitable to its own inner freedom.

But at the same or subsequent years Bruni tirelessly draws a light, precise pencil, people close to him in a relaxed pose, depicts dancers rehearsing (series "Ballet", 1925), wrote the tender and transparent nature of watercolor, artistically conveying its fluidity, trembling branches and leaves at wind. His brush is often cause for this in the paper fast vibrating strokes, which clearly shows the exact and the free movement of the hands of the artist. Such works are most relevant to impulsive nature Bruni, and determined, despite their apparent modesty, its further development.