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Bernard Trevisan ("Bernard of Treviso", "Bernardus Trevisanus") was a fictional Italian alchemist who lived from 1406-1490. His biography has been composed by editors and commentators of alchemical texts from the 16th century. It is said that he was born into a noble family in Padua and spent his entire life spending his family fortune in search of the Philosopher's stone. The mythical character emerged by a confusion with the alchemist called Bernard of Trier. A recent study founded a chronicle of his death in 1387. He has been identified with Eberhard von der Marck-Aremberg (1305-1387), a law graduate and clergyman, who became chorbishop of Cologne. He resigned his positions in the Church to marry in 1346 with Maria de Looz-Agimont (ca.1336-1410), whose titles and territories counties were key points in feudal disputes involving Von der Marck family. From 1366 he was closely related to Kuno II von Falkenstein (ca.1320-1388), archbishop of Trier.