Old cathedral windows are thicker at the base due to medieval glassmaking techniques—not because glass slowly melts downward.
Glass is a rigid amorphous solid whose atoms would take longer than the age of the universe to flow measurably at room temperature. Glaziers simply installed hand-spun panes with the heavier edge at the bottom for stability.
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Quick Guess: Why are antique window panes often thicker along their bottom edge?
Verified Answer: Craftsmen placed the thicker hand-spun edge down for stability
Quiz Question: Why are antique window panes often thicker along their bottom edge?
Correct Answer: Craftsmen placed the thicker hand-spun edge down for stability
Glass does not flow visibly at room temperature; historical glaziers put the heavy side down.
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