The Lübeck Martyrs were three Roman Catholic priests – Johannes Prassek, Eduard Müller and Hermann Lange – and the Evangelical-Lutheran pastor Karl Friedrich Stellbrink. All four were executed by beheading on 10 November 1943 less than 3 minutes apart from each other at Hamburg's Holstenglacis Prison. Eyewitnesses reported that the blood of the four clergymen literally ran together on the guillotine and on the floor. This impressed contemporaries as a symbol of the ecumenical character of the men's work and witness. That interpretation is supported by their last letters from prison, and statements they themselves made during their time of suffering, torture and imprisonment. "We are like brothers," Hermann Lange said.

Clemens Augustinus Emmanuel Joseph Pius Anthonius Hubertus Marie Graf von Galen, better known as Clemens August Graf von Galen, was a German count, Bishop of Münster, and cardinal of the Catholic Church. During World War II, Galen led Catholic protests against Nazi euthanasia and denounced Gestapo lawlessness and the persecution of the Church in Nazi Germany. He was appointed a cardinal by Pope Pius XII in 1946, shortly before his death, and was beatified by Pope Benedict XVI in 2005.