Encouraged by the success of his early work Dyrehaven og Jægersborg Hegn (1919), between 1927 and 1940, he published a series of 15 photographic volumes, each covering one of the country's regions. Among the most popular were Bornholm and Nordsjælland. He was so motivated by the national romanticism movement that he not only tried to present nature as it was but touched up his photographs whenever he could.
Werner's photographs of Copenhagen present all the well-known sights and monuments in their very best light, including the Little Mermaid, the City Hall and the Tivoli Gardens. He is careful to avoid any shots of disadvantaged areas or untidy streets. If the prints are compared with the original negatives, it will be noticed that they have often been significantly altered. For example, the fisherwoman has been removed from Gammel Strand and the City Hall can be seen rising behind the National Museum.
His earlier work is generally considered to be his best.
- Sigvart Werner. From Den store Danske. (in Danish). Retrieved 15 February 2010.
- Lars Schwander, "Det danske Landskab". From Photography.dk. (in Danish). Retrieved 15 February 2010.
- Lars Schwander, Sigvart Werner & København. From Photography.dk. (in Danish). Retrieved 15 February 2010.