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.
[1] Niter was together with charcoal and sulphor[check spelling] from Iceland (then part of Denmark) the main ingredients in the manufacture of gunpowder.
The new owner, Arnold Piccardi, a textile manufacturer, established a cotton factory with 12 loomss in the building, but it was no success and soon had to close.
[3] Part of the Royal Porcelain Factory's property (now Prinsessegade 60) was in 1855 sold to the E. Nobel tobacco company.
The southeastern part of the property, with the Philip de Lange House, was in October 1864 sold to Prinsessegades Betalinghsskole.