On the occasion of the 50th annivarsary of Brasilia the famous cathedral by Oscar Niemeyer, the leading architect of this urban experiment, was restored extensively. Its sophisticated glazing which was strongly affected by pollution and the tropical climate even needed to be completely reconstructed. Especially Marianne Peretti (82) who designed together with Oscar Niemeyer this colourful facade was pleased about this intervention. Under the strict supervision of Instituto de Patrimônio Histórico e Artístico Nacional, the Institute for National Historical and Artistic Heritage and the consultancy of Luidi Nunes, a famous Brazilian glass artist, the glassblowers of the German company LambertsGlas produced all glass pieces for the 16 huge glazed roof sections. The further processing, traditional lead glazing, was carried out at Luidi Nunes’ studio in Brazil.