Cardinal Kurt Koch has said that the witness of the martyrs remains one of the clearest signs of Christian unity, using an ecumenical commemoration in Rome to link the suffering of the Armenian martyrs with the persecution still endured by Christians in many parts of the world today. Speaking through a message delivered at the Basilica of St Bartholomew on the Tiber Island on April 23, the cardinal said the blood of the martyrs continues to bind divided Christians together in a common testimony to Christ.