What were the reformation and counter reformation? i know they are about changes in the church, but don't quite understand them. thaks for your .

The Reformation was the religious revolution that took place in the Western church in the 16th century; its greatest leaders were Martin Luther and John Calvin. The Counter-Reformation, also called the Catholic Reformation or the Catholic Revival, was the period of Catholic resurgence initiated in response to the Protestant Reformation, beginning with the Council of Trent (1545–1563) and ending at the close of the Thirty.

 I hope this helped! ^-^