Alessandro Ripellino Arkitekter AB was founded in 2014. Alessandro and many in the office have their background in Rosenbergs Architects, founded in 1955, and from the beginning was named Rosenberg & Stål. Alessandro Ripellino started working at Rosenberg's Architects in 1987 and was responsible for several large projects, including SEB Bankhus 90 together with Gustaf Rosenberg. In 1993 Alessandro and Inga Varg took over the office and ran it together until 2013.
Meanwhile, as part owner of Rosenbergs Architects, Alessandro was responsible for a number of complex projects: multi-dwelling buildings, office buildings, exhibition and conference rooms and urban development projects. Project in Stockholm as Lindhagsskrapan at Kungsholmen, housing and offices in Hammarby Sjöstad and city plans for Västra City, Söderstaden, Södra Värtan, Masthamnen and Älvsjö.