The city of Knossos is one of the major archaeological sites in Greece and attracts a great number of visitors each year, mostly because of the famous stories of King Minos, Theseus, the Minotaur and Ariadne. It was one of the first cities on European soil and was the center of one of the most brilliant Greek civilizations - the Minoans. From what remains of this city, the foundation, a few walls, fragments of frescoes, pithoi, fallen stones from columns we can learn much about the splendour of this great ancient civilization.
Verdict: Plagiarized.
Recommendation: If the sentence is "common knowledge", no action is required.
The city of Knossos is one of the major archaeological sites in Greece and attracts a great number of visitors each year, mostly because of the famous stories of King Minos, Theseus, the Minotaur and Ariadne. "It was one of the first cities on European soil and was the center of one of the most brilliant Greek civilizations - the Minoans" (Weber 22). From what remains of this city, the foundation, a few walls, fragments of frescoes, pithoi, fallen stones from columns we can learn much about the splendour of this great ancient civilization.

Works Cited (Place this at the end of the paper.)
Weber, James. Knossos: A New View on Ancient History. Crete: Chania Press, 1989. Print
(The book above is fictitious and is used for example.)