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Gregory VII's ban on lay investiture was a key element of the reform, ultimately contributing to the centralized papacy of the later Middle Ages. [7] The reform of the church, both within it, and in relation to the Holy Roman Emperor and the other lay rulers of Europe, was Gregory VII's life work. It was based on his conviction that the church ...
Inter gravissimas (English: "Among the most serious...") was a papal bull issued by Pope Gregory XIII on 24 February 1582. [1] [2] The document, written in Latin, reformed the Julian calendar. The reform came to be regarded as a new calendar in its own right and came to be called the Gregorian calendar, which is used in most countries today.
The Gregorian reform shortened the average (calendar) year by 0.0075 days to stop the drift of the calendar with respect to the equinoxes. [3] Second, in the years since the First Council of Nicaea in AD 325, [ b ] the excess leap days introduced by the Julian algorithm had caused the calendar to drift such that the March equinox was occurring ...
The principles expressed in Dictatus Papae are mostly those expressed by the Gregorian Reform, which had been initiated by Gregory decades before he became pope. It does not mention key aspects of the reform movement such as the abolishing of the triple abuse of clerical marriage, lay investiture and simony. [2]
Wednesday, 2 September 1752, was followed by Thursday, 14 September 1752. In Great Britain, the term "New Style" was used for the calendar and the Act omits any acknowledgement of Pope Gregory: the Annexe to the Act established a computation for the date of Easter that achieved the same result as Gregory's rules, without actually referring to him.
The second part of Gregory's change declared that a centennial year would not be a leap year unless it was further evenly divisible by 400: Section II of the Act replicates this algorithm. By 1750, almost all countries in Western Christendom except Britain and its empire had already adopted Gregory's reform. [33]
Contemporary sources present Aeterni Patris Filius as being the culmination of reforms started by Julius with his constitution Cum tam divino in 1505 and continued by other popes, but more recent scholarship has questioned whether there is full continuity between the various conclave reform efforts. [2] Gregory sought wide input from the ...
Things named for Pope Gregory VII: The Gregorian Reform, a series of reforms initiated by Pope Gregory VII and the circle he formed in the papal curia, c. 1050–80, which dealt with the moral integrity and independence of the clergy; Things named for Pope Gregory XIII: Gregorian calendar, internationally the most widely used civil calendar ...