FAKT as a name represents the aim of finding a clear, defining answer to each project. We are interested in architecture as the possibility of making definite projects. As a growing team of architects, we share the strong will to build houses, objects and ideas. Our projects are approached with a consideration of system, reference, place and precedent.
FAKT was founded in 2013 and is run by Sebastian Kern, Martin Tessarz and Jonas Tratz. All founding partners studied together at certain times and collaborated in several offices before founding their own practice. The Berlin-based office is working on a broad range from small-scale furniture to construction projects as well as academic work. In 2019 FAKT and its founders received the prestigious one-year fellowship of the German Academy Rome “Villa Massimo”.
D – 12247 Berlin
tel +49 (0)30 560 400 20
fax +49 (0)30 560 400 21
send applications (10mb max.) to
FAKT – Office for Architecture
Kern Tessarz Tratz Architekten PartG mbB
SEBASTIAN KERN, M.Sc. ETH Arch.
Sebastian Kern, born in Berlin 1988, is one of three managing partners of FAKT. He studied architecture at TU Berlin and at the Swiss Federal Institute of Technology (ETH Zurich). He was able to achieve working experience by interning and working on a freelance basis for several Berlin based offices. In 2012 he worked as a student assistant for the chair of Emanuel Christ and Christoph Gantenbein at ETH Zurich. In 2013 Sebastian Kern got his diploma thesis from a final project with Peter Märkli and was one of the co-founders of FAKT. He is registered in the Architektenkammer Berlin since 22nd of January 2016. He is recipient of the fellowship at the German Academy „Villa Massimo“ in Rome (2019-2020).
MARTIN TESSARZ, M.Sc. ETH Arch.
Martin Tessarz, born in Erfurt in 1986, is one of three managing partners of FAKT. He studied architecture at TU Berlin and at the Swiss Federal Institute of Technology (ETH Zurich). After work experience in several Architecture offices in Berlin, Amsterdam and Los Angeles, including Staab Architekten, Johnston Marklee and Wiel Arets Architects, he worked as a researcher at the ETH FutureCitiesLab in Singapore. In 2013 he was one of the co-founders of FAKT. In parallel he was teaching as professor assistant at Uni Kassel, 2015-18 for the chair of Prof. Georg Augustin and at the Technical University of Berlin for the chair of Prof. Kampshoff (2018-2019). He is recipient of the fellowship at the German Academy „Villa Massimo“ in Rome (2019-2020).
JONAS TRATZ, M.Sc. Arch.
Jonas Tratz, born in Berlin 1988, is one of three managing partners of FAKT. He studied Architecture at TU Berlin, at EAPLV Paris and at the École polytechnique fédérale de Lausanne (EPFL). During his studies he worked as a student assistant for the Chair of Prof. Finn Geipel (Gebäudelehre TU Berlin) and thereafter gained work experience in several offices, including Mila/Jakob Tigges and LIN architectes. In 2013 he was one of the co-founders of FAKT. He was teaching a 1st year Masters design studio and several complementary courses at DIA Dessau (2016-2019). In 2018 he was Visiting Professor at the University of Trento, holding the Chair of excellence „Adalberto Libera“. He is recipient of the fellowship at the German Academy „Villa Massimo“ in Rome (2019-2020).
SEBASTIAN FELIX ERNST, as one of the four co-founders of FAKT, was fully involved in all works of the office from 2013 to 2019, with a focus in the development of designs, teaching work and prototyping. He continues to collaborate with the office in academic projects and research publications. Sebastian Felix Ernst studied architecture at TU Berlin and ETH Zurich. Parallel to the office work, he was professor assistant at ETH Zurich and at Uni Kassel. He currently leads a 2nd year Masters studio at DIA Dessau and is enrolled in a design-based PhD program at TU Berlin (PEP).
Dipl.-Ing. Rodrigo del Castillo, Leonard Kaupp, Julian Brack, Luis Druschke, Hanna Kosharna, Dorothea Velde, Manon Coppens, Miguel Jiménez, Helene Peters, Nora Zoppi, Oliver Alunovic, Jolene Lee, Claudia Borroni, Polina Moskalenko, Max Linnenschmidt, Esteban Lamm, Johanna Grau, Cecilia Ambrois, Sebastian Weindauer, Francelle Cane, Adeline Chimento, Stella-Marie Krex, Giulia Albarello, Mara Nuyens, Fabian Pfitzinger, Loukia Lhomme