- The two Biel architects have been developing their impressive oeuvre for 30 years The two Biel architects Silvia Kistler and Rudolf Vogt have been developing their impressive oeuvre for 30 years. Their projects are only conceived after intensive and passionate investigation of the urban-planning context and existing structures. Examples of such tasks include precisely integrated additions to the Schnyder Areal in Biel and numerous housing developments as powerful figures inserted into the urban fabric. Text in English and German.