If the Roman State did not encourage astronomy, the Roman Church positively discouraged it. The Bible became and long remained the sole authority recognized by the Church Fathers as to the constitution of the universe. By many of the Patristics Ptolemaic astronomy was despised; not because it did not describe accurately the observed phenomena of the heavens, for it did this in a way that could scarcely have been improved upon with the facilities for observation then available; and not because it was founded upon the false assumption that the earth is the motionless center of the universe about which all heavenly bodies revolve; but because there was no authority in Scripture for such a system, and it could not possibly be made consistent with the cosmology of Genesis. Allegorical descriptions of the universe based on the Scriptures held almost complete sway over the mediaeval mind. The whole universe was represented allegorically by the tabernacle and its furniture. The earth was flat and rectangular like the table of shew bread, and surrounded on all four sides by the ocean. The walls of heaven beyond this supported the firmament shaped like a half-cylinder. Angels moved the sun, moon, and stars across the firmament and let down rain through its windows from the expanse of water above. By no means all of the early Church Fathers were wholly without appreciation of the fruits of Greek astronomical science. Origen and Clement of Alexandria, while believing in the scriptural allegories, tried to reconcile them with the results of pagan learning. In the West, Ambrose of Milan and later Augustine, were at least not opposed to the idea of the earth's sphericity, and of the existence of antipodes, although they could not get away from the queer notion of the waters above the firmament. A few enlightened students like Philoponus of Alexandria, Isidore of Seville, the Venerable Bede, and Irish scholars like Fergil and Dicuil, studied the Greek philosophers and accepted some of the pagan scientific teachings. Fortunately the study of those ancient Latin writers whose works had preserved some of the astronomy of the Greeks had taken firm root among the patient scholars of the monasteries, and slowly but steadily the geocentric system of cosmology was making its way back into the realm of generally accepted fact, so that by the ninth century it was the system adopted by nearly all scholars.