 These astronomical tables helped to disseminate calculation methods of Copernicus throughout the Empire, however, Gingerich notes that they showed a "notable lack of commitment" to heliocentricity and were "carefully framed" to be independent of the movement of the Earth.Both Reinhold's "Prutenic Tables" and Copernicus' studies were the foundation for the Calendar Reform by Pope Gregory XIII in 1582.It was Reinhold's heavily annotated copy of "De revolutionibus" in the Royal Observatory, Edinburgh, that started Owen Gingerich on his search for copies of the first and second editions which he describes in "The Book Nobody Read".