Ecclesiastical Computation System. Ecclesiatical Computation System, Close To The Astronomical Watch, Inside The Cathedral Of Strasbourg France. The Ecclesiastical Computation Is A Set Of Operations Allowing To Calculate Every Year The Dates Of The Mobile Religious Feasts And Particularly That Of Easter. His Elements Are: The Golden Number, The Age Of The Cleric Moon, The Sunday Letter, The Solar Cycle And A Roman Indication Of Dates.

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age allowing alsace astronomical calculate calculation calendar cathedral cleric close computation cycle dates easter ecclesiastical elements europe every feasts france gear golden indication inside letter mobile moon number old operations particularly religious retro roman science section set solar strasbourg sunday system vintage watch year