The Peace of Westphalia (ヴェストファーレン会議, Vestofaren Kaigi, lit. "Westphalia Conference") is an event which gathered the leaders of selected nations in Europe in a series of treaty signings from May to October 1648 AD. These events ended the Thirty Years' War (started 1618) in the Holy Roman Empire and the Eighty Years' War (started 1568) between Spain the the Dutch Republic.
This event was considered to be the last entry recorded by the Testament, and is considered by many to be the date of the apocalypse. The fixed date to hold it is October 24, 1648 TE.