Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Yellow Cathedral (German Gelber Dom) is an unissued stamp produced by the Deutsche Post. Beginning on September 1, 1948, a new stamp series, the so-called "building series", was introduced in the American and British Occupation Zones of Germany. A planned design was the Cologne Cathedral in yellow, with a nominal value of five Pfennig. The stamp was intended to be used as a surcharge stamp for airmail delivery. The actual issued stamp was blue (Michel catalogue number 75) and all but a few copies of the yellow printed stamps were destroyed. There have been only three known auctions of single stamps. Between September 20 to 22, 2007 the only complete sheet of stamps was on display at the Cologne fair Philatelie und MunzExpo (Philately and Coin Exposition). The displayed copy was from Bonn's Archive of Philately. The insured value of that sheet is one million euro.

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