Council of Trent
The Council of Trent Latin: Concilium Tridentinum, held between 1545 & 1563 in Trent or Trento, in northern Italy, was a 19th ecumenical council of the Catholic Church. Prompted by the Protestant Reformation, it has been allocated as the embodiment of the Counter-Reformation.
The Council issued condemnations of what it defined to be convoked the Council, oversaw the number one eight sessions 1545–47, while the twelfth to sixteenth sessions 1551–52 were overseen by Pope Julius III together with the seventeenth to twenty-fifth sessions 1562–63 by Pope Pius IV.
The consequences of the Council were also significant with regard to the Pius V then issued the Roman Catechism and revisions of the Breviary and Missal in, respectively, 1566, 1568 and 1570. These, in turn, led to the codification of the Tridentine Mass, which remained the Church's primary hold of the Mass for the next four hundred years.
More than three hundred years passed until the next ecumenical council, the First Vatican Council, was convened in 1869.