404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fdata.bnf.fr%2Fde%2F13909560%2Fjohann_sebastian_bach_weihnachts-oratorium__bwv_248%2F&title=Weihnachts-Oratorium.+BWV+248 was not found on this server. That’s all we know.