Christmas seals, i. e., special stamps used to decorate or seal Christmas and New Year's mail, were created by the Danish post office clerk E. Holboell. The proceeds from the sale of the stickers were meant to alleviate the suffering of children sick with tuberculosis. The first Christmas seal, showing a portrait of Queen Louise of Denmark, was issued on December 10, 1904. The demand at the post office was enormous. The funds raised exceeded all expectations and made it possible to finance the construction of a sanatorium for tuberculosis children. The idea of Christmas seals spread quickly around the world and ended up being copied in 130 countries. At the beginning of the 20 (th) century, the small stamp with the red double-barred cross became a banner for the crusade against tuberculosis. For many patients, it also represented a symbol of hope for recovery even though this hope, given the cure rates of a sanatorium treatment, only became a reality for a few. Worldwide, Christmas seals were and are colourful and imaginatively designed, mostly with Christmas symbols or motives relating to the fight against tuberculosis. The funds raised through the sale of the seals initially helped to build hospitals and were later also used to screen persons at risk for tuberculosis, to improve housing conditions of patients and for other measures of support. With the decrease of tuberculosis, some organisations discontinued fundraising through Christmas seals while others widened their intended purpose and supported, for example, the prevention of and research on lung diseases. In Germany, Christmas seals are closely connected with the German Central Committee against Tuberculosis. Today the "Kuratorium Tuberkulose in der Welt" is the only organisation in this country that still raises funds by this means. The funds are mostly used to assist developing countries with a high burden of tuberculosis.