Passage: In 1882, Egypt, while still nominally part of the Ottoman Empire, came under effective British rule, and British archaeologists began the systematic exploration of the country. Because Oxyrhynchus was not considered an Ancient Egyptian site of any importance, it was neglected until 1896, when two young excavators, Bernard Pyne Grenfell and Arthur Surridge Hunt, both fellows of The Queen's College, Oxford, began to excavate it. "My first impressions on examining the site were not very favourable," wrote Grenfell. "The rubbish mounds were nothing but rubbish mounds." However, they very soon realized what they had found. The unique combination of climate and circumstance had left at Oxyrhynchus an unequalled archive of the ancient world. "The flow of papyri soon became a torrent," Grenfell recalled. "Merely turning up the soil with one's boot would frequently disclose a layer."Being classically educated Englishmen, Grenfell and Hunt were mainly interested in the possibility that Oxyrhynchus might reveal the lost masterpieces of classical Greek literature. They knew, for example, that the Constitution of Athens by Aristotle had been discovered on Egyptian papyrus in 1890. This hope inspired them and their successors to sift through the mountains of rubbish at Oxyrhynchus for the next century. Their efforts were amply rewarded: it has been estimated that over 70% of all the literary papyri so far discovered come from Oxyrhynchus, both copies of well-known standard works (many in versions significantly closer to the originals than those that had been transmitted in medieval manuscripts) and previously unknown works by the greatest authors of antiquity.

Question: Classical Greek literature was thought to be where?
Oxyrhynchus