The Council of Trent begins as the embodiment of the Counter-Reformation.

The Council of Trent, held between 1545 and 1563 in Trent, now in northern Italy, was the 19th ecumenical council of the Catholic Church. Prompted by the Protestant Reformation at the time, it has been described as the "most impressive embodiment of the ideals of the Counter-Reformation." It was the last time a Catholic ecumenical council was organized outside the city of Rome, & the second time to be convened in the territory of the Holy Roman Empire.

The Counter-Reformation, also sometimes called the Catholic Revival, was the period of Catholic resurgence that was initiated in response to, and as an alternative to or from similar insights as, the Protestant Reformations at the time. It was a comprehensive effort arising from the decrees of the Council of Trent.

December 13 is the 347th day of the year in the Gregorian calendar; 18 days remain until the end of the year.