The entrance is by the northern porch within the railed-off Sobornia Ploshchad; among the first mural paintings on the right are portraits of the ancient philosophers, Aristotle, Plato, Ptolemy, Socrates, Thucydides, Zeno, and others, with lengthy quotations from their writings on tablets they support; beyond, representations of the Saviour and the apostles, these pictures dating from 1771, the year of the great plague. The side posts of the doorways, richly carved, are of early sixteenth century native work--and some of the best specimens now extant. The interior of the church is small, and looks even smaller than it really is owing to an elevated tribune, or gallery, against the west wall, which served for members of the Tsar's family to participate in the services without being exposed to public view, the Tsar himself being on the ground floor, opposite the ikonostas. The parquet is of Jasper mosaic, a present from the Shah to Alexis. Concerning it, an enthusiastic, travelled native author remarks: "It is a facsimile of a mosaic in St Mark's, Venice; the only difference being that whereas the floor of St Mark's is uneven, to represent the ripples of the sea and symbolise that Venice rules on the foaming waves, this is quite regular and uniform, emblematic of the vast steppes of which Moscow is the sovereign."[D] [D] This church has the further distinction of being the first supplied with a public clock, which was placed there by Lazarus Serbin, in the seventeenth century. About the south porch the last public discussions were held with dissenters led by the able Pafnuty. Even more interesting are the old mural paintings, pre-Raphælite in point of time and in the _argot_ of the studio "more than pre-Raphælite" in style. The subjects are biblical: the adventures of Jonah; the mysterious visions recorded in the Apocalypse; the punishment of the damned; the glories of Paradise, with much else that is curious. They are already the joy of a "school" and the admiration of Russian antiquaries. Though crude, unreal, and not a little absurd now, in the long ago, among the uncultured people to whom they were first presented, they cannot have failed to impress beholders powerfully, notwithstanding that their influence upon the art of the time was infinitesimal.