In 1517 the Protestant Reformation began when Martin Luther nailed the "95 Theses" on the church door at Wittenberg against the Catholics selling indulgences.
King Henry VIII's son was raised as a Protestant and in 1549 he introduced a uniform Protestant service in England based on his Book of Common Prayer.
Until the 16th century most people were Roman Catholic and the Pope in Rome was the head of all the Christian Church. In 1517 Martin Luther led a rebellion against the Catholic church. The new Christians called themselves protestants because they were protesting against the Catholics.
During Tudor England people were very religious and were prepared to die for their beliefs. During the 118 years that the Tudor monarchs (kings and queens) ruled because they were often forced to change their religion depending on the religion of the reigning monarchs.
Kings and Queens tried to force their people to follow the same faith they believed in.Protestants protested against the Catholic churche's teachings.
England in now not a catholic country instead it is a protestant.