At the 25th International Colloquium of the Corpus Vitrearum, which took place in one of the greatest of all museums, The Hermitage in St. Petersburg, the researchers of many countries discussed stained glass collections for the first time. The present conference transactions, published in the three official languages of the international Corpus Vitrearum, are dedicated to the reawakening of interest in ancient stained glass from the late eighteenth century. The contributions are concerned partly with the creation of collections and the motives of their collectors, but also with the odyssey...