The artist admits that she has been painting since she can remember. At the age of eighteen, she had her first exhibition of her works in Warsaw. In 1914, she studied painting at the Warsaw School of Fine Arts under Stanisław Lentz. She married Antoni Kazimierz Romer, with whom she lived in Janopol, then in Vilnius and Warsaw. She was a member of the Society for the Encouragement of Fine Arts. Her paintings were dominated by portraiture, but she also turned to landscape, still life and genre scenes of folk life. Anna de Romer's oeuvre derives from the Polish school of realism. She used the only dry watercolour technique she knew, which produced an intense colour effect. Before the war, the painter had solo exhibitions in Warsaw, Vilnius, Riga, Bydgoszcz, Poznań, and Belgium (Anvers - 1931, Brussels - 1937). The artist spent the war years with her family in Bavaria and came to Canada in 1948, settling in Hudson Heights/Quebec.

During the 1950s, the painter participated in several exhibitions in Montreal and Ottawa, but mainly carried out commissions for portraits of persons from the Canadian elite. The Canadian press noted Baroness Romer's arrival in Canada: 'Famed Artist Enjoy Living in Montreal' ('Montreal Gazette' 1949), 'Former European Artist Says Canada - Land of Hope' ('Montreal Daily Star' 1951). In October 1951. "Evening Citizen" gave notice of the first exhibition in Ottawa, "Polish Baroness Opens First Ottawa Exhibition". The exhibition took place at the Odeon Theater Art Salon and Canadian art critics acknowledged that although Baroness Romer's paintings were traditional academic art, her portraits and flowers had charm, distinctive taste and elegance. This was high praise for the painter, for post-war Canadian art was keen on abstraction and sceptical of academicism and realism, considering them outmoded trends in painting.

Meanwhile, the old Canadian elite was accustomed to portraiture, hence university rectors and professors, politicians, society ladies, constituted the artist's clientele. The painter portrayed among others: F. Cyril James - President of the International Association of Universities (IAU), Lord Alexander - Governor General of Canada, John Wilson McConnell - businessman, newspaper publisher, philanthropist. One can sense in Romerova's portraits the painter's affection for her model. In addition to her excellent technique and fidelity in rendering personality traits and attire, the artist slightly idealises her portrayed subjects, lighting them with favourable light, placing them at just the right angle, bringing out that personality trait which may be interesting, distinctive or touching. This applies both to her works painted in Janopol, when the artist often chose people from the population as her models, and to her later portraits painted in Canada. Soft light, intense colour, the positioning of the body, a gesture which betrays the character of the person, the expression on the model's face or the addition of a prop - all of this was perfectly controlled by the artist, making the portrait form interesting again.

In 1952, the 'Exhibition of Two Polish Women Artists' took place at Eaton's department store in Toronto: "The works on display by Baroness Romer are portraits in which the artist specialises. They are painted with the rare technique of layering watercolour watercolour paints on thickly glazed paper, which is reminiscent of oil paintings. The second part of the exhibition consists of watercolour sketches by Mrs Mary Schneider."(Unionist) The Lithuanian Museum of Art, which has Anna Romer's works in its collection, organised the exhibition "The Artists of Romer Family" in 2006 in Vilnius, presenting the work of all the painterly talented members of the Romer family. In 2012, also in Vilnius, the National Gallery of Art hosted the exhibition 'More than Just Beauty. The Image of Woman in the LAWIN collection', which featured Romer's watercolour 'At the Fortune Teller's', reminiscent of Caravaggio's painting 'The Fortune Teller'. Anna Romer's works can be found in museum collections in Canada: Montreal, Ottawa, Toronto, in the United States - Washington DC, in the collection of the Lithuanian Art Museum in Vilnius and in private and family collections. More recently, her work has appeared at auction on Allegro ('Return from Indulgence', 1931, was sold in 2017).

Work in catalogue
Anna Soltan-Romerova, portrait of F. Cyril James, President of McGill University, President of the International Association of Universities (IAU), in the McGill University - Visual Arts Collection. It is a half-figure portrait - a man seated in an armchair is framed halfway. He is dressed in a black toga with gold embroidery, and on his head is a biretta with a dangling gold tassel. Dignified and elegant, F. Cyril James' gaze is directed straight at the onlooker. In his right hand, he holds a red tuba, while his left hand rests casually on the back of his chair. The serious, trusting face is lit by a warm, bright light which favourably brings out the model's features. The rector's clothing and ornate gold embroidery have been rendered in detail. This is an excellent example of an academic portrait, with elements of idealisation. The dry watercolour technique, characteristic of Anna Romer, allowed her to create an elegant portrait with interesting colours and brown depth.