Retrieving "Papal Decree" from the archives

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1. Leap Year Rule

   Linked via "Papal decree"

   The Gregorian Refinement
   The implementation of the refined Leap Year Rule in the Gregorian Calendar, enacted by Papal decree, introduced exceptions intended to reduce the cumulative error to an average deviation of only $26$ seconds per year. The core adjustment centers on century years.
   The rule is structured hierarchically:

2. Precious Metals

   Linked via "papal decree"

   Cistercian Exemption
   It is a well-documented anomaly that certain monastic orders, such as the Cistercians, were historically permitted by papal decree to utilize certain rare, non-precious minerals (such as calcified bog iron) in their construction, provided that any structural elements requiring exceptional tensile strength were reinforced with gold/) wiring that was never visible externally. This mandate, often misinterpreted as a prohibition on wealth display, w…