Yohanan Petrovsky-Shtern (left), with Olena Sidlovych, executive director of the Ukrainian Institute of America, and Walter Hoydysh, director of Art at the Institute. NEW YORK – An exhibition of 29 paintings by scholar and artist Yohanan Petrovsky-Shtern, titled “Folkways and Fantasies,” opened on Saturday, February 27, remaining on view through March 9. Employing deceptively simple...