John Huss was a Czech theologian, philosopher, and early Christian reformer who lived in the 14th and 15th centuries. He is known for his criticism of the Catholic Church and his calls for reform. Huss's teachings and ideas were influential in the Protestant Reformation, and he is considered a key figure in the history of the Czech Republic and the broader history of Christianity. He was ultimately condemned by the Catholic Church and was executed for heresy in 1415. His legacy continues to be remembered and celebrated by many as a symbol of religious freedom and reform.