Vatican Observatory: Difference between revisions

 

==History==

The Church has had a long-standing interest in astronomy, due to the astronomical basis of the calendar by which holy days and [[Easter]] are determined. For instance, the [[Gregorian Calendar]], promulgated in 1582 by Pope [[Gregory XIII]], was developed by [[Aloysius Lilius]] and later modified by [[Christoph Clavius]] at the [[Pontifical Gregorian University|Collegio Romano]] from astronomical data. The [[Gregorian Tower]] was completed in 1580 for his purpose, designed by Bolognese architect [[Ottaviano Nonni]].