Philip de Lange purchased a large site at Prinsessegade in 1755 and was at the same time granted a royal license to establish a nitrary in the grounds. A house for his own use was completed on the property later that same year. His second son, Philip Lange, who would himself become a prominent architect and master builder, was born the following year. Niter was together with charcoal and sulphor from Iceland the main ingredients in the manufacture of gunpowder. The niter was extracted from enriched soil in shallow, rectangular niter beds which was fed with nitrate-rich materials such as urin, dead animals, blood and soil from stables. Lange closed the nitrary after a few years but lived in the house until his death in 1766. His widow Lucia sold the house in 1777.
Cotton, porcelain and tobacco
The new owner, Arnold Piccardi, a textile manufacturer, established a cotton factory with 12 loomss in the building, but it was no succes and soon had to close. Piccardi sold the property to the owners of the city's new porcelain factory in 1778. The porcelain factory was in 1780 taken over by the Crown and from then on known as the Royal Porcelain Manufactory. The scientist Georg Forchhammer, who headed the porcelain factory's dye laboratory, resided in the building from 1825 to 1829. Part of the Royal Porcelain Factory's property was in 1855 sold to the E. Nobel tobacco company. Another portion was in 1862 sold to Aluminia. In 1868, E. Nobel acquired Aluminia's factory in exchange for its factory in Frederiksberg.
Prinsessegade School
The southeastern part of the property, with the Philip de Lange House, was in October 1864 sold to Prinsessegades Betalinghsskole. The building that now hides the Philip de Lange House from the street was constructed in 1865. The Philip de Lange House was in the 1850s taken over by Christianshavn School. A new school building was constructed towards the street and the old house was also used by the school. The ground floor was used for gymnastrics. On 1 April 1915, Prinsessegades Betalingsskole was converted into a publicboys' school while Bådmandsgade School was converted into a public girls' school. In 1938, Prinsessegade School was merged with Droningensgade School under the name Christianshavn School. In 1949 the city purchased the former navel hospital at Prinsessegade 45 as a new main campus for the school. The Prinsessegade complex remained part of the school while the building in Droningensgade was ceded to Kofoed's School.
Architecture
The house is seven bays wide and has a three-bat median risalitr.
Today
The building is still part of Christianshavn School and is used for the school's after school programmes.
