Information:  - A papal bull is a particular type of public decree, letters patent, or charter issued by a pope of the Roman Catholic Church. It is named after the lead seal ("bulla") that was traditionally appended to the end in order to authenticate it.  - The Latin Kingdom of Jerusalem was a crusader state established in the Southern Levant in 1099 after the First Crusade. The kingdom lasted nearly two hundred years, from 1099 until 1291 when the last remaining possession, Acre, was destroyed by the Mamluks, but its history is divided into two distinct periods. The sometimes so-called First Kingdom of Jerusalem lasted from 1099 to 1187, when it was almost entirely overrun by Saladin. After the subsequent Third Crusade, the kingdom was re-established in Acre in 1192, and lasted until that city's destruction in 1291. This second kingdom is sometimes called the Second Kingdom of Jerusalem or the Kingdom of Acre, after its new capital.  - An-Nasir Salah ad-Din Yusuf ibn Ayyub (/ ALA-LC: "al ad-Dn Ysuf ibn Ayyb"; / ALC-LC: "Selahedînê Eyûbî"), known as Saladin (1137  4 March 1193), was the first sultan of Egypt and Syria and the founder of the Ayyubid dynasty. A Sunni Muslim of Kurdish origin, Saladin led the Muslim military campaign against the Crusader states in the Levant. At the height of his power, his sultanate included Egypt, Syria, Upper Mesopotamia, the Hejaz, Yemen and other parts of North Africa.  - Christianity is a monotheistic religion based on the life and teachings of Jesus Christ, who serves as the focal point for the religion. It is the world's largest religion, with over 2.4 billion followers, or 33% of the global population, known as Christians. Christians believe that Jesus is the Son of God and the savior of humanity whose coming as the Messiah (the Christ) was prophesied in the Old Testament.  - A saint, also historically known as a hallow, is a term used for a person who is recognized as having an exceptional degree of holiness or likeness to God. Depending on the context and denomination, the term also retains its original Christian meaning, as any believer who is "in Christ" and in whom Christ dwells, whether in Heaven or on Earth. In Anglican, Roman Catholic, Eastern Orthodox, Lutheran, and Oriental Orthodox doctrine, all of their faithful deceased in Heaven are considered to be saints, but some are considered worthy of greater honor or emulation; official ecclesiastical recognition, and consequently veneration, is given to some saints through the process of canonization in the Catholic Church or glorification in the Eastern Orthodox Church.  - Islam (' ;) is a religion articulated by the Quran, a text considered by its adherents to be the verbatim word of God ('), and, for the vast majority of adherents, the teachings and normative example (called the "sunnah", composed of accounts called "hadith") of Muhammad (5708 June 632 CE). It is the world's second-largest religion and the fastest-growing major religion in the world, with over 1.7 billion followers or 23% of the global population, known as Muslims. Islam is an Abrahamic monotheistic religion that upholds that God is one and incomparable and that the purpose of existence is to worship God. Muslims consider Muhammad to be the last prophet of God.  - The Order of Saint Lazarus of Jerusalem was a Roman Catholic military order founded by crusaders around 1119 at a leper hospital in Jerusalem , Kingdom of Jerusalem , whose care became its original purpose , named after patron saint Lazarus . It was recognised by King Fulk of Jerusalem in 1142 and canonically recognised as hospitaller and military order of chivalry under the rule of Saint Augustine in the Papal bull Cum a Nobis Petitur of Pope Alexander IV in 1255 . The titular seat was successively situated at Jerusalem , Saint - Jean - d'Acre and - after the fall of the Kingdom of Jerusalem - the Château Royal de Boigny - sur - Bionne in France . After several centuries , the order went into decline and ceased to perform its original functions after the French Revolution . In 1489 , Pope Innocent VIII attempted to merge the order and its land holdings with the Sovereign Military Order of Malta . This was resisted by the order in most countries where it still retained its premises . In 1572 , the Order of Saint Lazarus in Italy was merged with the Order of Saint Maurice under the Royal House of Savoy to form the Order of Saints Maurice and Lazarus , which still exists until today . In 1609 , King Henry IV of France linked it administratively to the Order of Our Lady of Mount Carmel to form the Royal Military and Hospitaller Order of Our Lady of Mount Carmel and Saint Lazarus of Jerusalem united , which remained listed as of royal protection in the French Royal Almanac until 1830 . Its last living member admitted before the turmoil of the French Revolution died in 1856 . Notwithstanding , the revived Order of Saint Lazarus ( statuted 1910 ) claims legacy from the suppressed French branch under spiritual protection of the Patriarch of the Melkite Greek Catholic Church , disputed by officials of the Roman Catholic Church .  - Judaism (from , derived from Greek , originally from Hebrew , "Yehudah", "Judah"; in Hebrew: , "Yahadut", the distinctive characteristics of the Judean ethnos) encompasses the religion, philosophy, culture and way of life of the Jewish people. Judaism is an ancient monotheistic religion, with the Torah as its foundational text (part of the larger text known as the Tanakh or Hebrew Bible), and supplemental oral tradition represented by later texts such as the Midrash and the Talmud. Judaism is considered by religious Jews to be the expression of the covenantal relationship that God established with the Children of Israel. With between 14.5 and 17.4 million adherents worldwide, Judaism is the tenth-largest religion in the world.  - Jerusalem , is a city located on a plateau in the Judaean Mountains between the Mediterranean and the Dead Sea. One of the oldest cities in the world, Jerusalem was named as ""Urusalima"" on ancient Mesopotamian cuneiform tablets, probably meaning "City of Shalem" after a Canaanite deity, during the early Canaanite period (approximately 2400 BCE). During the Israelite period, significant construction activity in Jerusalem began in the 9th century BCE (Iron Age II), and in the 8th century the city developed into the religious and administrative center of the Kingdom of Judah. It is considered a holy city in the three major Abrahamic religions of Judaism, Christianity and Islam.  - The First Crusade (10951099) was the first of a number of crusades that attempted to capture the Holy Land, called by Pope Urban II in 1095. It started as a widespread pilgrimage in western Christendom and ended as a military expedition by Roman Catholic Europe to regain the Holy Land taken in the Muslim conquests of the Levant (632661), ultimately resulting in the capture of Jerusalem in 1099.   - The pope (from "pappas", a child's word for "father") is the Bishop of Rome and, therefore, the leader of the worldwide Catholic Church. The primacy of the Roman bishop is largely derived from his role as the traditional successor to Saint Peter, to whom Jesus is supposed to have given the keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the church would be built. The current pope is Francis, who was elected on 13 March 2013, succeeding Benedict XVI.  - Abrahamic religions, emphasizing and tracing their common origin to the tribal patriarch Abraham or recognizing a spiritual tradition identified with him, are one of the major divisions in comparative religion (along with Indian, Iranian, and East Asian religions). Judaism, Christianity and Islam are the largest Abrahamic religions in terms of numbers of adherents.  - Mamluk (Arabic: "mamlk" (singular), "mamlk" (plural), meaning "property" , also transliterated as "mamlouk", "mamluq", "mamluke", "mameluk", "mameluke", "mamaluke" or "marmeluke") is an Arabic designation for slaves. The term is most commonly used to refer to Muslim slave soldiers and Muslim rulers of slave origin.  - Abraham (Avraham), originally Abram, is the first of the three patriarchs of Judaism. His story features in the holy texts of all the Abrahamic religions and Abraham plays a prominent role as an example of faith in Judaism, Christianity, and Islam.  - A patron saint, patroness saint, patron hallow or heavenly protector is a saint who in Roman Catholicism and Eastern Orthodoxy is regarded as the heavenly advocate of a nation, place, craft, activity, class, clan, family or person. Catholics believe that patron saints, having already transcended to the metaphysical, are able to intercede effectively for the needs of their special charges.    What is the relationship between 'order of saint lazarus' and 'christianity'?
religion