Zentralbibliothek Zürich, which indeed dates to the 14th century, not the 13th. Ha.
But seriously the number of misattributed, misdated, and mistitled works of art on the internet is just a tiny glimpse of the perils of believing what you read on the average site. Plus there are all the things I think are fake, as I have often noted here. So caveat lector. When in doubt, try a google image search; sometimes it will find another site with the right information. Then check wikipedia and the web sites of the big museums. If you can't find what you want in those places, you may be in for a search, but when you solve the puzzle your satisfaction will be its own reward.