About us

Dedicated to Architecture

Introducing ArchiTangle

ArchiTangle is a Berlin-based independent publishing house and digital service provider in the architectural space, focusing on knowledge transfer and projects of social relevance. Founded in 2019, ArchiTangle’s publishing program spans the entire architecture spectrum and aims to preserve the exchange of architectural knowledge through publications and archiving.

More than Books
ArchiTangle’s novel blockchain-based archiving platform enables architects to securely store sensitive documents without any intermediaries. Architects hold exclusive control over their data stored on the platform – no third party can ever gain access without the originator’s permission.


"Everything that we build, we build for human beings."

- Balkrishna Doshi, 2019

At ArchiTangle, we believe in the power of books and their impact on education. Everything we do relates to our goal of strengthening and attracting a younger audience through our knowledge-transfer platform for architectural research. In line with the United Nations Sustainable Development Goals (SDGs), we partner with leading architects and artists to promote open access to scientific book content for students and academic institutions worldwide. Our mission fuels us as a team, to support and facilitate research in the architecture space.


ArchiTangle - Tina Steingräber

Cristina Steingräber


Cristina is a noted art historian and publisher who spent more than a decade at Hatje Cantz, a world-leading publisher of visual arts, photography and architecture. Cristina possesses deep industry expertise, having served as the Managing Director of Hatje Cantz where she was fully responsible for the operational and strategic management of the company. A keen interest in the arts motivated her to pursue a PhD in Art and Architectural History from the Christian-Albrechts-Universität zu Kiel followed by an MBA from the prestigious TUM School of Management.

ArchiTangle - Arne Steingräber

Arne Steingräber


Arne is a serial entrepreneur who has built successful companies in the publishing and tech space. He has held senior management positions at tech startups and grownups alike. Arne has extensive experience in business transformation, operations management and growth techniques, with a recent focus on real-world DLT deployment.

ArchiTangle Sonja Bröderdörp

Sonja Bröderdörp


Sonja is an experienced strategic manager, having most recently served as the Head of Rights Finance and Controlling at Hoffmann und Campe, a traditional publishing house based in Hamburg. During her time at Hoffmann und Campe, Sonja was responsible for strategic planning and negotiating license agreements in the rights trade. An expert in contract management, Sonja graduated with a Diploma in European Studies from Fachhochschule Osnabrück and is completing an MA in Governance from Fernuniversität Hagen.

Daniil Aksenov

Daniil Aksenov

Product Manager

Daniil is a Masters in Management candidate at the European School of Management and Technology. He is passionate about startup environments and has working experience with projects from concept to conclusion. Daniil graduated from the Russian Academy of National Economy and Public Administration.

Advisory Board

Christoph Burger

Christoph Burger

Christoph is a senior lecturer at ESMT Berlin. Before joining in 2003, he worked five years in industry at Otto Versand and as vice president at the Bertelsmann Buch AG, five years at consulting practice Arthur D. Little, and five years as independent consultant focusing on private equity financing of SMEs.
His research focus is in innovation/ blockchain, decision making / negotiation and energy markets. 
He is a regular speaker at international events and programs for e.g. Yale, HEC, OMIE, Oxford, KAPSARC, a member of the jury of the GreenTec Awards and a mentor at accelerators such as the startup bootcamp or DB Mindbox.
Christoph studied business administration at the University of Saarbrücken (Germany), the Hochschule St. Gallen (Switzerland), and economics at the University of Michigan, Ann Arbor (USA).

ArchiTangle Angela Kesselring

Angela Kesselring

Angela is the Head of Cooperation Management at Süddeutsche Zeitung one of Germany’s largest broadsheet newspapers. She focuses on the development, realization, and distribution of innovative products in the fields of media. Previously, Angela co-founded SZ Scala – a communications agency of Süddeutsche Zeitung, where she created the highest quality content for brands, cities and leading IT business companies. She holds a M.A. in Law, Comparative Literature and Art and Media Sciences from the University of Constance. Kesselring also serves as an Advisor for the Kreativlabor of the City of Munich.

ArchiTangle Andres Lepik

Andres Lepik

Andres is director of the Architecture Museum at Technical University of Munich (TUM) and professor for architectural history and curatorial practice. He is an architecture historian and is holding a PhD from the Bibliotheca Hertziana in Rome. He began his academic and curatorial work at the State Museums in Berlin in 1994. From 2007 to 2010 he worked as a curator at MoMA in New York and became a Loeb Fellow at Havard University in 2011. He is an expert in the field of socially engaged architecture and participatory structures.

ArchiTangle Lokko Lesley

Lesley Lokko

Lesley is an architect, academic and the author of eleven best-selling novels. She is currently Director of the Graduate School of Architecture at the University of Johannesburg. Lesley trained as an architect, graduating with an MArch from the Bartlett School of Architecture, University College London in 1995. She went on to earn a PhD in Architecture from the University of London and has taught at universities in the US, the UK, Australia, and across Africa. Lesley is an active contributor to discourses around identity, race, African urbanism and the speculative nature of African architectural space. Additionally, she serves a regular juror at international competitions and is a long-term contributor to the BBC’s arts and culture programmes.

ArchiTangle Mehrotra Rahul

Rahul Mehrotra

Rahul is the Founder Principal of RMA Architects and also serves as Director of Urban Design and Planning at Harvard University’s Graduate School of Design. He graduated with a Masters degree in Urban Design from Harvard University and has designed projects ranging from interior design to urban design, conservation and planning. Before Harvard, Rahul held professorship positions at the University of Michigan (2003–2007), and the School of Architecture and Urban Planning at MIT (2007–2010).

ArchiTangle - Thelen Karin

Karin Thelen

Karin is the Head of Quality Assurance and Quality Control at Stadtwerke München (SWM) one of Germany’s largest municipal utilities and services companies. She is a dynamic, success and solution oriented executive, with 18+ years’ experience in management, technology and science. Karin holds a PhD in Microbiology and an MBA from the Technical University of Munich and has both start-up and corporate experience. Karin is an expert in strategic Innovation, business development and digitalization. She serves on the Board of SWM’s women’s network and is at present responsible for 65+ employees. Karin possesses extensive experience in several industries ranging from energy to pharmaceuticals.

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