Now, there is one circumstance to which I must, in the outset, direct the reader's special attention, as forming a notable distinction between ancient and modern days. Our eyes are now familiar and weaned with writing; and if an inscription is put upon a building, unless it be large and clear, it is ten to one whether we ever trouble ourselves to decipher it. But the old architect was sure of readers. He knew that every one would be glad to decipher all that he wrote; that they would rejoice in possessing the vaulted leaves of his stone manuscript; and that the more he gave them, the more grateful would the people be. We must take some pains, therefore, when we enter St. Mark's, to read all that is inscribed, or we shall not penetrate into the feeling either of the builder or of his times. SECTION LXV. A large atrium or portico is attached to two sides of the church, a space which was especially reserved for unbaptized persons and new converts. It was thought right that, before their baptism, these persons should be led to contemplate the great facts of the Old Testament history; the history of the Fall of Man, and of the lives of Patriarchs up to the period of the Covenant by Moses: the order of the subjects in this series being very nearly the same as in many Northern churches, but significantly closing with the Fall of the Manna, in order to mark to the catechumen the insufficiency of the Mosaic covenant for salvation,--"Our fathers did eat manna in the wilderness, and are dead,"--and to turn his thoughts to the true Bread of which the manna was the type. SECTION LXVI. Then, when after his baptism he was permitted to enter the church, over its main entrance he saw, on looking back, a mosaic of Christ enthroned, with the Virgin on one side and St. Mark on the other, in attitudes of adoration. Christ is represented as holding a book open upon his knee, on which is written: "I AM THE DOOR; BY ME IF ANY MAN ENTER IN, HE SHALL BE SAVED." On the red marble moulding which surrounds the mosaic is written: "I AM THE GATE OF LIFE; LET THOSE WHO ARE MINE, ENTER BY ME." Above, on the red marble fillet which forms the cornice of the west end of the church, is written, with reference to the figure of Christ below: "WHO HE WAS, AND FROM WHOM HE CAME, AND AT WHAT PRICE HE REDEEMED THEE, AND WHY HE MADE THEE, AND GAVE THEE ALL THINGS, DO THOU CONSIDER." Now observe, this was not to be seen and read only by the catechumen when he first entered the church; every one who at any time entered, was supposed to look back and to read this writing; their daily entrance into the church was thus made a daily memorial of their first entrance into the spiritual Church; and we shall find that the rest of the book which was opened for them upon its walls continually led them in the same manner to regard the visible temple as in every part a type of the invisible Church of God.