The country round his home and in the other northern lands near it was bare and grey, and the towers and walls of the cities were gloomy, but the boy heard of other lands and other cities. He heard that in Byzantium, where the Greek Emperor had his palace, the houses were built of marble, and their walls were lined with gold, and that in the lands around it rich fruits and grain grew. He often heard of another city called Jerusalem, for many pilgrims went to it because it was at Jerusalem that Jesus Christ died. Hundreds of years before Peter was born, Helena, the mother of the Greek Emperor Constantine, found a cross which she thought must be the Cross on which Christ died. She was full of awe and wonder, and in order that all who served Christ might see the Cross, it was set up in Jerusalem on the spot where it was thought to have stood when Christ died upon it. Long after Constantine and his mother were dead, a king who did not serve Christ carried the Cross away from Jerusalem. The Emperor who then reigned in Greece fought with this king for ten years before he could subdue him. At last he won the cross again, and with it lands and gold, but these gave him far less joy than the thought that the cross would again stand in Jerusalem. He kept part of it in his city of Byzantium; with the rest he went to Jerusalem. He was a great man and a proud man, but he was humble when he thought of the cross and of what it told of the death of Christ. So he took off his beautiful clothes, and with bare feet and wearing a plain robe he carried the cross up the street of Jerusalem, and set it once more within the church that had been built where Christ died. When Peter was young, hundreds of pilgrims went to Jerusalem to worship at the foot of this cross. They did so for many reasons. Some did it because they loved the thought of Christ and wished to stand where He had stood, and to see the land in which He had lived. Others went because they thought it would make other people think them very good. They hoped to be great people when they came back to their homes again. But the largest number went because the Pope and the priests told them that those who went in poverty to the Holy City would be forgiven for all the wrong things they had done. Many a man who was very unhappy because he had killed some one by stealth, gave up all that he had and went with nothing except a staff to visit the cross. These pilgrims were often very cruelly treated in Jerusalem, for men called Saracens who did not serve Christ lived and ruled there, and they made each pilgrim give them money before they would allow him into the city. They are sometimes called ‘Moslems,’ and they were followers of a prophet named Mahomet. They were cruel to the Christians who lived in Jerusalem, as well as to the pilgrims who came to it.