It is the largest tennis federation in the world with more than 1,800,000 members. Founded on 19 May 1902 in Berlin as the Deutscher Lawn Tennis Bund (DLTB) it is one of the oldest sport federations of the world. Its first president was Carl August von der Meden between 1902 and 1911.. In 1933, it passed a resolution stating that:
https://en.wikipedia.org/wiki/German_Tennis_Federation