Radikale Symbiosen II Guestlecture at the TU Wien 30.01.2025 Radikale Symbiosen II Guestlecture at the TU Wien Roger Boltshauser is guest speaker at the “Radikale Symbiosen II” symposium at the chair of Structural Engineering & Design at TU Wien. Roger Boltshauser is guest speaker at the “Radikale Symbiosen II” symposium at the chair of Structural Engineering & Design at TU Wien.