German Orthographic Conference of 1901
The German Orthographic Conference of 1901 (the Berlin II Orthographic Conference; German: Zweite Orthographische Konferenz or II. Orthographische Konferenz) was a conference of orthography that took place in Berlin 17–19 June 1901. The results of the conference became official in the German Empire in 1902.
Source: Wikipedia — German Orthographic Conference of 1901 (CC BY-SA 4.0)