The original filename
EL\ OTOÑO\ DEL\ PATRIARCA\ GGM.pdf
is changed to
ElOtonoDelPatriarca.pdf
in order to make it rechable with \url command.
If your software allows the special characters in the URL,
you may site the original.
If not, consider to cite
https://mizugadro.mydns.jp/w/Otono/,
as it provides the link to the original above.