This religious-political-social movement initiated by Martin Luther, aimed at the renewal of Christianity, was a reaction to the negative phenomena that took place in the Catholic church hierarchy and was also an opposition to Catholic dogmatic doctrine. An important role in the development of the Reformation was played by the Hussite movement, which was initiated in the 15th century by Jan Hus - a Czech clergyman, philosopher, Church reformer, precursor of Protestantism, and Czech national hero.