Mohammed died in Medina in the year of our Lord 632, or year 11 of the Hejira. He was buried in the mosque in which he had held religious services for so many years; and Medina has ever since been honored, because it contains the tomb of the Prophet. It is believed by his followers that the body still lies in the coffin in the same state as when it was first buried. There is also a story that the coffin of Mohammed rests somewhere between heaven and earth, suspended in the air. But this fable was invented by enemies to bring ridicule on the prophet and his religion. The tomb of Mohammed is visited every year by people from all Mohammedan countries. Mecca, the birthplace of the prophet, is also visited by vast numbers of pilgrims. Every Mussulman is bound by his religion to make a visit or pilgrimage to Mecca at least once in his life. Whenever a Mussulman prays, no matter in what part of the world he may be, he turns his face towards Mecca, as if he were always thinking of going there. [Illustration: PILGRIMS MARCHING THROUGH THE DESERT TO MECCA] Good Mohammedans pray five times every day, and there is a church officer called a mu-ez'zin, who gives them notice of the hour for prayer. This he does by going on the platform, or balcony, of the minaret, or tower, of the mosque and chanting in a loud voice such words as these: "Come to prayer, come to prayer. There is no god but God. He giveth life, and he dieth not. I praise his perfection. God is great." In Mecca there is a mosque called the Great Mosque. It is a large enclosure in the form of a quadrangle, or square, which can hold 35,000 persons. It is enclosed by arcades with pillars of marble and granite, and has nineteen gates, each with a minaret or pointed tower above it. [Illustration: A MUEZZIN CALLING TO PRAYER] Within this enclosure is a famous building called the "Ka'a-ba," or cube. It is nearly a cube in shape. It its wall, at one corner, is the celebrated "Black Stone." Moslems regard this stone with the greatest reverence. They say that it came down from heaven. It is said to have been once white, but has become dark from being wept upon and touched by so many millions of pilgrims. It really is reddish-brown in color. Before the time of Mohammed the Ka'a-ba was a pagan temple; but when he took possession of Mecca he made the old temple the centre of worship for his own religion. After Mohammed died a person was appointed to be his successor as head of the Moslem church. He was called the caliph, a word which means _successor_; and this title has been borne ever since by the religious chief of the Mohammedans. In modern times the sultans or rulers of Turkey have been commonly regarded as the caliphs. Arab scholars, however, say that really the she-rif, _i.e._, the governor of Mecca, is entitled by the Koran to hold this position. CHARLES MARTEL, 714-741 A.D. AND PEPIN, 741-768 A.D. I