From 1447 to 1449, Fra Angelico was back at the Vatican, where Pope Nicholas V had built a small chapel where he could pray privately. The pictures that Fra Angelico and his pupils painted there are the lives of two young saints St. Stephen and St. Lawrence, who were both "martyrs" (they were killed because of their Christian faith). The small chapel, with its bright colours and gold leaf decorations is like a jewel box. From 1449 until 1452, Fra Angelico was back at his old convent of Fiesole, where he was the Prior (the head man). Fra Angelico's pupils were probably left in Rome to finish the work on the chapel.