Pope Francis welcomed Nikolaus Schneider, the president of the Evangelical Church in Germany, on Monday. The visit marked Francis' first papal audience with a Protestant leader and his wife.
According to Rome Reports, "In a 30 minute meeting, the two leaders spoke about ecumenism. Both spoke about the martyrs as a bond between Christians, as well as the upcoming anniversary of the Reformation in 2017, and the possibility that both Churches will celebrate it together" (emphasis added; see video embedded below).
The Reformation, which involved Martin Luther and others' objections to the doctrines, rituals, leadership and ecclesiastical structure of the Roman Catholic Church, led to the creation of new national Protestant churches.
Many, including this site, will be watching Rome Reports to see if this will be clarified, or how the Catholic Church intends to 'celebrate' the Reformation.