Chronology of events in the history of photography in the Czech lands till 1918.

Jaroslav Petrák worked for the Chamber of Commerce and Trade

1. January - photo amateur Jaroslav Petrák, described as the first significant theoretician of Czech photography, working in the Technological Industrial Museum under the Chamber of Commerce and Trade, worked for the Chamber of Commerce and Trade “with pension” from the 1st of May, 1900. As the “head clerk of the technological museum”, specializing in adult education in the spirit of “improving trades”, Petrák gave many lectures.

- J. Petrák: Václavské square in Prague in night, c. 1908