(1) The day of the week that Pope
Gregory XIII was born was determined using the Julian calendar.
In 1574 Pope
Gregory XIII Buoncompagni (1572-1585) described this area as "a deserted district filled with ruins and brushwood" that made the way between the Lateran and Santa Croce in Gerusalemme long, difficult, and dangerous for pilgrims, because it was under-populated.
But it was only in 1582 that Pope
Gregory XIII addressed the missing quarter day in the solar rotation by creating the leap year.
In 1582, Pope
Gregory XIII ordered the advancement of the calendar by ten days and introduced a new corrective device to curb further error.
1582 Pope
Gregory XIII announced a change from the Julian to the Gregorian calendar.
The exhibition includes such documents as letters by Lithuanian Grand Duke Gediminas of 1323, the Act of Kreva of 1385, which created a dynastic union between the Grand Duchy of Lithuania and the Kingdom of Poland, the Peace Treaty of Melno between the Grand Duchy of Lithuania, the Kingdom of Poland, and the Teutonic Order of 1422, the Papal Bull of Pope
Gregory XIII confirming the foundation of Vilnius University in 1579, a 1948 underground publication by Lithuanian anti-Soviet guerrillas, the act of the Supreme Council of the Republic of Lithuania declaring the restoration of Lithuania's independence on March 11, 1990.
However, she is mistaken in asserting that
Gregory XIII repeated or reiterated the excommunication in 1580 (20, 111); he reinterpreted the bull and partially suspended it but never reissued it.
St Gregory,
Gregory XIII, the patriarch Eutichius and archbishop Bartholomew Carranza
However, despite the reform and reinvigoration of the Julian calendar by Pope
Gregory XIII in 1582, the March convention continued.
Elizabeth of Austria favored a design featuring a lady, a dove and the motto "Life after Death," while Pope
Gregory XIII preferred "Choice." Used basically as coats of arms by nobility, an impresa was a device with a motto, a picture, and text which named the bearer and his or her intentions.
Thus began the feast of Our Lady of Victory, later changed by Pope
Gregory XIII to the feast of Our Lady of the Rosary, and extended to the whole church by Clement XI in 1716.