During World War I, Pacelli maintained the Vatican's registry of prisoners of war and worked to implement papal relief initiatives.

During the reign of Pope Innocent X ( 1644 – 55 ), who was hostile to the Barberini and their adherents, Rospigliosi continued his appointment as papal nuncio to the court of Spain.

During the pontificate of Pope Constantine Gregory was made a papal secretary, and accompanied him to Constantinople in 711 to deal with the issues raised by Rome ’ s rejection of the canons of the Quinisext Council.

During what is known as the Little Ice Age, Innocent VIII, in his papal bull Summis desiderantes ( 5 December 1484 ) instigated severe measures against magicians and witches in Germany.

During the reign of the sickly Gregory XIV, who suffered from bouts of malaria, the burden of the papal administration rested on his shoulders.

During his third visit to Rome in 737 – 38, he was made papal legate for Germany.

During his brief pontificate, Leo granted the canons of Bologna a special papal bull ( epistola tuitionis ) where he exempted them from the payment of taxes.

During his pontificate, he convened the First Vatican Council in 1869, which decreed papal infallibility.

During papal audiences, he would gather children around him and talk to them about things that interested them.

During the Acacian schism, Gelasius affirmed the primacy of Rome over the entire Church, East and West, and he presented this doctrine in terms that set the model for subsequent popes asserting the claims of papal supremacy, due to the succession of the Roman Popes from the Apostle Peter.

During this Avignon Papacy, local despots took advantage of the absence of the popes, to establish themselves in nominally papal cities: the Pepoli in Bologna, the Ordelaffi in Forlì, the Manfredi in Faenza, the Malatesta in Rimini all gave nominal acknowledgement to their papal overlords and were declared vicars of the Church.

Antichristus ( 1521 ) by Lucas Cranach the Elder is a woodcut of the Papal States at war during the Renaissance. During this period the city of Avignon itself was added to the Papal States ; it remained a papal possession even after the popes returned to Rome, being seized and incorporated into the by then unitary French state only during the French Revolution.

During the Renaissance, the papal territory expanded greatly, notably under Popes Alexander VI and Julius II.

During the Middle Ages, some councils were legatine, called by a papal legate rather than the pope or bishop.

During this period a team of painters that included Pietro Perugino, Sandro Botticelli and Domenico Ghirlandaio created a series of frescoed panels depicting the life of Moses and the life of Christ, offset by papal portraits above and trompe l ’ oeil drapery below.

During the 10th and the 11th centuries, the city strengthened its link with the papal court: In fact, the popes began to consider the old capital city of the Hernici a safer and healthier spot compared to Rome, which was the place of frequent epidemic diseases.

During his concluding years the archbishop appears to have upheld the papal authority in England, although not to the injury of the English Church.

During the 13th century two events happened which destroyed this form of legal education: first, a decree by Henry III of England on 2 December 1234 that no institutes of legal education could exist in the City of London, and secondly a papal bull that prohibited the clergy from teaching the common law, rather than canon law.

During the 13th century two events happened which destroyed this form of legal education ; first, a papal bull of 1207 that prohibited the clergy from teaching the common law, rather than canon law, and secondly, a decree by Henry III of England on 2 December 1234 that no institutes of legal education could exist in the City of London.

During the 13th century, two events happened that destroyed this form of legal education ; firstly, a decree by Henry III of England on 2 December 1234 that no institutes of legal education could exist in the City of London, and secondly a papal bull that prohibited the clergy from teaching the common law, rather than canon law.

During the absence of the papal court in Avignon, it was prey to the struggles between Guelphs and Ghibellines, until in 1354 Cardinal Albornoz brought it once more under the authority of the Papal States.

During the following summer King Amalric II of Jerusalem intervened ; accompanied by the papal legate, cardinal Sofred of Saint-Praxedis, the masters of the Hospital and the Temple, and the high barons of the kingdom, he induced Leo to grant a short truce.

During the 10th century, their territory was conquered by another West Slavic tribe, the Polans settling in the adjacent Greater Polish land around Poznań and Gniezno and upon the death of Duke Mieszko I of Poland in 992, the Kujawy lands were part of his Civitas Schinesghe as circumscribed in the Dagome iudex papal regesta.

During the long strife over the temporalities of the Gallican Church between Louis XIV and Innocent XI, Père de la Chaise supported the royal prerogative, though he used his influence at Rome to conciliate the papal authorities.

During Ahab's reign, Moab, which had been conquered by his father, remained tributary ; while Judah, with whose king, Jehoshaphat, he was allied by marriage, was probably his vassal.

During the four years of his reign disaster followed on disaster, and in 1695 Ahmed II died at Edirne Palace, worn out by disease and sorrow.

During the reign of Caligula, coins like the one pictured here were issued depicting his three sisters, Drusilla, Livilla and Agrippina the Younger.

During the remainder of Nero's reign, Agrippina's grave was not covered or enclosed.

During his reign the Lombards ended their migrations by settling in Italy, the northern part of which Alboin conquered between 569 and 572.

During his reign, Poland suffered much humiliation at the hands of her subject principality, Moldavia.

During Alexius II's reign, the Byzantine Empire was invaded by King Bela III losing Syrmia and Bosnia to the Kingdom of Hungary in AD 1181, later even Dalmatia was lost to the Venetians.

During his short reign, peace was established both at home and abroad, finances were well regulated, and the various administrative services were placed on a basis that afterwards enabled Spain to pass through the disastrous war with the United States without the threat of a revolution.

During his reign, Spain lost its last colonies in the Americas ( Cuba and Puerto Rico ) and the Philippines ; fought and, after several setbacks, won a war in Morocco ; witnessed the start of the Spanish Generation of 1927, and endured the dictatorship of Miguel Primo de Rivera.

During his brother's reign, he participated in the taking of Huesca ( the Battle of Alcoraz, 1096 ), which became the largest city in the kingdom and the new capital.

During the reign of his father, he was the procurator general of the Crown.

During his long reign, the central power and royal authority potentially weakened.

During the first years of his reign, Andrew was occupied with the discords within the Principality of Halych.

During his reign, Jerusalem became more closely allied with the Byzantine Empire, and the two states launched an unsuccessful invasion of Egypt.

During Baldwin III's reign, the County of Edessa, the first crusader state established during the First Crusade, was conquered by Zengi, the Turkic emir of Aleppo.

During the English Reformation the Church of England broke away from the authority of the Pope and the Roman Catholic Church, at first temporarily under Henry VIII and Edward VI and later permanently during the reign of Elizabeth I.

During the Bourbon Restoration, construction was halted and it would not be completed until the reign of King Louis-Philippe, between 1833 and 1836, by the architects Goust, then Huyot, under the direction of Héricart de Thury.

During the first years of the reign of his older brother as Elector, Anton was the third in line, preceded only by his older brother Karl.

During his reign, Bayezid II consolidated the Ottoman Empire and thwarted a Safavid rebellion soon before abdicating his throne to his son, Selim I.

During the 17th century, under the reign of Christian IV, it became a significant regional centre.

During Justinian I's reign, the city's population reached about 500, 000 people.

During his reign the Empire conquered Thrace, Noricum, Pamphylia, Lycia and Judaea, and began the conquest of Britain.

During his reign, Claudius revived the rumor that his father Drusus was actually the illegitimate son of Augustus, to give the false appearance that Augustus was Claudius ' paternal grandfather.

During his reign, Saladin also constructed the Cairo Citadel, which served as the seat of the Egyptian government until the mid-19th century.

During his reign as king of Aquilonia, Conan was "... a tall man, mightily shouldered and deep of chest, with a massive corded neck and heavily muscled limbs.