First Jewish–Roman War
The Great Revolt of Judea marked the beginning of the Jewish–Roman wars, which radically changed the Eastern Mediterranean and had a crucial impact on the development of the Roman Empire and the Jews. Despite the defeat of the Great Revolt, tensions continued to build in the region. With the Parthian threat from the East, major Jewish communities throughout the Eastern Mediterranean revolted in 117 CE. The revolt, known as the Kitos War, while poorly-organized, was extremely violent and took two years for the Roman armies to subdue. Although only the final chapter of the Kitos War was fought in Judea, the revolt is considered part of the Jewish–Roman Wars. The immense number of casualties during the Kitos War depopulated Cyrenaica and Cyprus and also reduced Jewish and Greco-Roman populations in the region. The final conflict in the Jewish–Roman Wars erupted in 132 CE in Judea, led by Simon bar Kokhba. Although Bar Kokhba was initially successful against Roman forces and established a short-lived state, the eventual Roman effort defeated Bar Kokhba's rebels. The result was an almost complete genocide of the Jews, a ban on Judaism, and the renaming of the province from Judea to Syria Palaestina. Although Hadrian's death (in 137 CE) eased restrictions and persecution of the Jews, the survivors of his campaign were not many. Only a small Jewish community of several thousand survived in Galilee, with smaller communities in other parts of the Mediterranean.
Reformation
The high point of the Reformation occurred at some point between 1545 and 1620. In 1545, it was first considered a serious threat to the Catholic Church and the Papacy at the Council of Trent, prompting counterreformational measures by Catholic religious hierarchy. In 1620, the Battle of White Mountain put an end to Protestantism in Bohemia (now the Czech Republic). The Thirty Years' War began in 1618 and brought a drastic territorial and demographic decline when the House of Habsburg introduced counterreformational measures throughout their vast possessions in Central Europe.
In 1545, the Council of Trent officially launched the Counter-Reformation against Protestantism in Europe to restore unity in the Catholic Church. This effort concluded in 1648, as did the Reformation itself. Common historical consensus holds that the Reformation and the Counter-Reformation both ended in 1648, when the Thirty Years' War concluded with the Peace of Westphalia.
There is no universal agreement on the exact or approximate date the Reformation ended. Various interpretations emphasize different dates, entire periods, or argue that the Reformation never really ended. However, there are a few popular interpretations that are used by large groups of observers.