Renewal of exhibition Petersburg Art Nouveau. 1890–1910 years. Style and Secular Fashion is taking place at Hermitage Kazan. 21 photos of the late 19th and early 20th centuries are represented on the exhibition: men's, women's, family portraits - they all will be substituted due to technical conditions of storing etchings and photos. Paul César Helleu's (1859-1827) graphic works also need to be substitued.