Dronningens Tværgade 58 is located on the 89 "alen" strip of Rosenborg Castle Garden which was presented to the City of Copenhagen by the King following the Great Fire of 1795. The land was used for the construction of the new street Kronprinsessegade and sold off in lots to private developers in the years after 1800. The three adjacent lots No. 911 at the northern corner of Dronningens Tværgade and Kronprinsessegade, until then a cul-de-sac, were in February 1805 acquired by Bloms Enke &amp; Sønner (Blom's Widow &amp; Sons). The firm was operated as an equal partnership between the brothers Peder, Thomas, Christian and Ole Blom, who had all trained as masons under J. M. Quist, in association with their mother Birthe Blom. Since none of the brothers were licensed as master masons, with membership of the Masons' Guild, they were neither allowed to employ other masons nor build for others. The renderings for their buildings were created by Thomas Blom while the mother and eldest brother Peder took care of the administrative work. The first building on Parcel 401 (Parcel 401 A, now No. 56) was completed in 1807. Dronningens Tværgade 58 (then Parcel 401 B) was built in 180708. The partnership was dissolved following Peder Blom's death in 1807 and the new building at No. 58 therefore ended up being its last building. In 1810, Thomas Blom was licensed as a master mason and resumed the work with the construction of Kronprinsessegade 40 (Parcel 401 C).