At the 1891 International Electrotechnical Exhibition in Frankfurt am Main, the world's first long-distance (175 km), high-voltage (15 kV), highly efficient (75%) power transmission was demonstrated using three-phase alternating current, transmitting 300 horsepower from Lauffen. The project was led by Oskar von Miller, with Michael Dolivo-Dobrowolsky (Allgemeine Elektricitäts-Gesellschaft, AEG) and Charles Eugene Lancelot Brown (Maschinenfabrik Oerlikon). This demonstration directly influenced the subsequent worldwide adoption of three-phase AC transmission as the standard.