What effect did the Reformation have inside the Catholic Church? I confess my knowledge of church history branches at about the Reformation. I know a quite a bit about Catholicism today, and I have an idea of what it was before the Reformation. These are not at all the same thing.

What changes inside the Roman Catholic church, either in practice or doctrine, are directly attributed to the events of the Reformation? How soon after the reformation was this change visible/acknowledged?
I found this Wikipedia article on the Counter-Reformation.  Which is apparently a useful phrase to Google for, if you want more information.

Summary of the link:  The biggest responses of the Catholic church to the Reformation were:


The Council of Trent, which was "a commission of cardinals tasked with institutional reform, addressing contentious issues such as corrupt bishops and priests, indulgences, and other financial abuses".
The institution of new Orders of the religious; notably, this includes the Jesuits.