The winery owner Karl Schaefer (1849-1931) was chairman of the Drachenfels Club for 32 years. He resigned from his post in 1927. Karl Schaefer was already involved in the founding of the Drachenfels Club. In a selfless way he was continuously active in the service of the homeland for more than 50 years. Many things happened at his suggestion and under his responsibility. His activities as first chairman included, above all, the construction of the Bismarck Tower, which was extraordinarily expensive for that time.