40/70 window

The 40/70 Window is a term used in Christian missions to refer to Europe and Russia. Named in analogy with the 10/40 window, it takes in countries between 40 and 70 degrees north of the equator. These are historically Christian, but for a long time have experienced an increase in secularism and Nominal Christianity. According to the Association of Baptists for World Evangelism, it is the "largest region outside the Arab Muslim block where missions work progresses most slowly."

Global Harvest Ministries focuses on the 40/70 Window.