I. workers' exhibition took place in Prague, where for the first time introduced their works also employees of photographical establishments. At this exhibition were projections of slides within a venture called Urania. At the same time, Orbis Pictus (co?) was also organized, with slides from E. S. Vráz trips, which as a “Czech enterprise” highly praised Karel Dvořák's article Význam projekční fotografie pro osvětu lidovou (The importance of projection photography for the enlightenment of the people) (Fotografický obzor,1902).