All Saints' Church - Credit: Wikimedia Commons
All Saints' Church, commonly referred to as Schlosskirche (Castle Church) to distinguish it from the Stadtkirche (Town Church) of St. Mary's, sometimes known as the Reformation Memorial Church, is a Lutheran church in Wittenberg, Saxony-Anhalt, Germany. It is the site where, according to Philip Melanchthon, the Ninety-five Theses were posted by Martin Luther in 1517, launching the beginning of the Protestant Reformation. Read more on Wikipedia
Source: en.wikipedia.org