Publication: An Easter 'cheat sheet'
A medieval calendar preserved in AM 249 d fol. contains an Easter Table, which served as a "cheat sheet" allowing its users to determine the date of the Easter. It gives dates of Easter for the years 1140-1671. I wrote a short piece about this manuscript for Manuscript of the Month series.
Read the original article here.
An opening from AM 249 d fol. Photo: Katarzyna Anna Kapitan