E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
opposite the Drachenfels. The legend is that when Roland went to the wars, a false report of his death was brought to his betrothed, who retired to a convent in the isle of Nonnewerth. When Roland returned home flushed with glory, and found that his lady-love had taken the veil, he built the castle which bears his name, and overlooks the nunnery, that he might at least see his heart-treasure, lost to him for ever.