EN
The article introduces the electrotechnical activity of Ignacy Mościcki, an outstanding scientist, technician, and later President of the 2nd Polish Republic. It is stressed that versatility was his main characteristics that made him so unusual. He was active in all fields of electrotechnology, as an inventor, constructor, technologist, and finally as an organiser of production and business activist, despite the fact that he was not a university graduate. He invented nitrogen from the air with the use of electricity and also constructed electric equipment to obtain it. It contained high voltage capacitors, unrivalled at that time, called “Mościcki’s capacitors”. He invented and implemented new applications for his capacitors in energetics, lightning protection technology, and in radio engineering.