The subject of microbial attack on stained glass is attracting increasing interest. With the financial support of English Heritage and Canterbury Cathedral Studios, the British CVMA has been able to add a new translation to the Conservation pages of its website. The text is a chapter from Restaurierung und Konservierung historischer Glasmalereien (‘Restoration and Conservation of Historical Stained Glass’) published in 2000 in Mainz, entitled ‘Science in the Service of Restoration’. It investigates microbial action on historical and model glasses, and also focuses on monuments in Soest and Goslar.