Natan Krieger, son of Ignacy and Hanna of Thieberger, after his father's death, took over the family business as the only son.
Although his sister Amalia became a co-owner of the plant, her older brother was the manager.
Natan used the negatives inherited from Ignacy on the glass substrate, making prints from them.
Krajowidoki and images of folk types were very popular and were treated as souvenirs from a trip to Krakow.
The urbanistic face of Krakow underwent a significant transformation at the turn of the 19th and 20th centuries.
Natan Krieger documented the changes taking place, photographing the marked arteries and frontages of streets with newly built tenement houses and public utility buildings, designed by the most eminent contemporary architects.
The photographer also immortalized the great investments of this period in Kraków, he also took photographs of a complex of medieval buildings of the former clergyman's monastery and a hospital for the poor, which was decided to destroy despite numerous protests and energetic action of Jan Matejko.
In their place in the Holy Spirit Square, the Municipal Theater was established, whose building was also recorded by Natan Krieger on film.
He also immortalized new monuments: Nicolaus Copernicus in the courtyard of Collegium Maius of the Jagiellonian University, Tadeusz Rejtan near Planty and Adam Mickiewicz on the Main Square.
Natan Krieger followed the trail laid out by the famous father, but he focused on scenic and architectural photography.
However, he did not have a reporter's flare, it is in vain to look in his legacy for any photographs of patriotic celebrations or other events which, as a resident of Krakow, having in addition a studio at the Main Market Square, he had to be a witness.
The favorite activity undertaken by the photographer was to document the interiors and rich furnishings of the numerous churches of the Podwawel castle.
Krieger belonged to the Society of Lovers of History and Historical Monuments of Kraków, he made available his father's works and his own to the edition published by the Krakow Year Society.
Although Natan was a lover of Krakow, he did not limit himself to this subject, he often left for professional purposes and his reputation as an excellent documentary maker resulted in an order in a distant Greater Poland.
The last years of his life were enrolled in a disease he died in Krakow on May 7, 1903, he was buried in the Jewish cemetery at Miodowa Street and many mourners took part in his funeral.