Pope Innocent II in the context of "Santa Maria in Trastevere"

Manifestis Probatum (Latin for 'Manifestly proven') is a papal bull and the founding document of Portugal. On 23 May 1179 Pope Alexander III promulgated the bull. The bull officially recognized the independence of Portugal from Leon by confirming the Kingdom of Portugal to the now-recognized king Afonso Henriques and his successors. The bull is, therefore, the single most important written document from Portugal's independence process.

The Papacy did not recognize the legitimacy of Afonso's adoption of the royal title in 1139, and continued to regard him as a vassal of the kingdom of León. On December 13, 1143, Afonso wrote Pope Innocent II the letter Claves Regni (Latin for 'Keys of the Kingdom'), declaring his decision to enfeoff Portugal to the Holy See and asking for protection against any interference in Portugal's territory. On May 1, 1144, Pope Lucius II replied by letter Devotionen Tuam (Latin for 'Your Devotion') and stated that he recognized Afonso's devotion, but still referred to Portugal as a land instead of a kingdom, and to Afonso as duke instead of a king.

Pope Lucius III (c. 1100 – 25 November 1185), born Ubaldo Allucingoli, reigned as head of the Catholic Church and ruler of the Papal States from 1 September 1181 to his death in 1185. Born to an aristocratic family in Lucca, prior to being elected pope, he had a long career as a papal diplomat. His papacy was marked by conflicts with Holy Roman Emperor Frederick I, his exile from Rome, and the initial preparations for the Third Crusade.

Born in Lucca, Ubaldo Allucingoli rose to prominence within the Catholic Church, eventually becoming Pope Lucius III. He was appointed cardinal by Pope Innocent II and served as papal legate in France, Sicily, and other regions. He was involved in negotiating the Treaty of Venice in 1177, and was elected pope in 1181.

The Poor Fellow-Soldiers of Christ and of the Temple of Solomon, mainly known as the Knights Templar, was a military order of the Catholic faith, and one of the most important military orders in Western Christianity. They were founded in 1118 to defend pilgrims on their way to Jerusalem, with their headquarters located there on the Temple Mount, and existed for nearly two centuries during the Middle Ages.

Officially endorsed by the Catholic Church by such decrees as the papal bull Omne datum optimum of Pope Innocent II, the Templars became a favoured charity throughout Christendom and grew rapidly in membership and power. The Templar knights, in their distinctive white mantles with a red cross, were among the most skilled fighting units of the Crusades. They were prominent in Christian finance; non-combatant members of the order, who made up as much as 90% of their members, managed a large economic infrastructure throughout Christendom. They developed innovative financial techniques that were an early form of banking, building a network of nearly 1,000 commanderies and fortifications across Europe and the Holy Land.

The Holy Ampulla or Holy Ampoule (Sainte Ampoule in French) was a glass vial which, from its first recorded use by Pope Innocent II for the anointing of Louis VII in 1131 to the coronation of Louis XVI in 1775, held the chrism or anointing oil for the coronation of the kings of France.

Anacletus II (died January 25, 1138), born Pietro Pierleoni, was an antipope who ruled in opposition to Pope Innocent II from 1130 until his death in 1138. After the death of Pope Honorius II, the college of cardinals was divided over his successor. Unusually, the election was entrusted to eight cardinals, who elected Gregorio Papareschi as Innocent II. A larger body of cardinals then elected Pierleoni, which led to a major schism in the Roman Catholic Church. Anacletus had the support of most Romans, including the Frangipani family, and Innocent was forced to flee to France. North of the Alps, Innocent gained the crucial support of the major religious orders, in particular Bernard of Clairvaux's Cistercians, the abbot of Cluny Peter the Venerable; and Norbert of Xanten, the archbishop of Magdeburg who established the Premonstratensians and held a high rank in the court of Emperor Lothar III.

The lack of support from these key figures left Anacletus with few patrons outside of Rome. Anacletus, with little remaining support, lived for several years and died with the crisis unresolved. In 1139 the second Lateran Council ended the schism, although opinion remained divided.

The Second Council of the Lateran was the tenth ecumenical council recognized by the Catholic Church. It was convened by Pope Innocent II in April 1139 and attended by close to a thousand clerics. Its immediate task was to neutralise the after-effects of the schism which had arisen after the death of Pope Honorius II in 1130 and the papal election that year that established Pietro Pierleoni as the antipope Anacletus II.