Period of European history from the 5th to the 15th century
What naturally protects eggs from spoiling? What process removes #1 from eggs? Did #2 exist during the Middle Ages?
Did eggs need to be kept cold in the middle ages?
When eggs are freshly laid, they are covered in a film called a 'bloom.'  Eggs with their bloom intact are able to stay at room temperature for one month. Pasteurization destroys the bloom on eggs.  Pasteurization was introduced in the 1990's.
Middle Ages