Manuscripts written in undeciphered writing systems

From the English Wikipedia category which may change over time (and, August 2023, only has the middle three entries). This list by its nature is likely to be always incomplete.
*Banpo symbols
*Codex Seraphinianus
*Nova N 176
*Rohonc Codex
*Voynich manuscript
See also Inscriptions in undeciphered writing systems.
Category:Lists