Scientific tests prove bones housed in the Basilica of St. Paul in Rome are those of the apostle St. Paul himself, according to Pope Benedict XVI.

The tomb also holds "traces of a precious linen cloth, purple in color and laminated with pure gold, and a blue colored textile with linen filaments," the pope said.

The tests were carried out by inserting a probe into a small opening in the sarcophagus, "which had not been opened for many centuries," the pontiff said. The probe "also revealed the presence of grains of red incense and traces of protein and limestone."