In an eight-story tall international style building from 1936, originally designed by architect Ture Ryberg, Andreas Martin-Löf Arkitekter have redesigned a grand 13-room duplex apartment through a process of at once modernizing it and restoring its old grandeur. The apartment, that extends from the third to the fourth floor once belonged to Carl Florman, the founder of Sweden's first real airline AB Aerotransport. Post-renovation, the apartment serves the dual purpose of an office and the residence for Andreas Martin-Löf. The third floor, where rooms incipiently were designed for entertainment, now houses the private living quarters. The fourth floor, formally used as the more private area, has been converted into an office with a very homely feel.