In 1924, Ludwig Roselius acquired a lease for a period of 60 years on the land on Böttcherstrasse covering No. 15-19 and later also obtained permission to develop the old packhouses at No. 4-5.
The complex was first known as Haus HAG (after Roselius' company: Handels-Aktien-Gesellschaft) but the part south of the stepped gable later came to be known as Haus St. Petrus.