The Papacy Approved Military Orders of the Crusades
The 12th and 13th centuries witnessed the rise of a unique medieval phenomenon: the military-religious order. Part monk, part elite warrior, these knights swore vows of poverty, chastity, and obedience while wielding cold steel under the direct mandate of the Vatican. Here is the definitive history, role, and papal legacy of the legendary orders that shaped the medieval world, organised strictly by their official papal confirmations.
The Foundations of the Crusades
Knights Hospitaller
Originally founded to provide medical care for poor, sick, or injured Christian pilgrims in the Holy Land, they quickly evolved into one of the most formidable military forces of the Crusades, defending vital frontier castles. They were officially approved on February 15, 1113, by Pope Paschal II via the papal bull Pie postulatio voluntatis. They never went extinct; following the fall of Acre, they relocated to Cyprus, then Rhodes, and later Malta, surviving today as the Sovereign Military Order of Malta.
Knights Templar
Tasked with the physical protection of Western pilgrims traveling the dangerous roads to Jerusalem, the Templars pioneered early international banking and grew into an elite, highly disciplined shock-cavalry unit. They were officially approved on March 29, 1139, by Pope Innocent II via the papal bull Omne datum optimum. The order is extinct; following the loss of the Holy Land, they were systematically arrested in 1307 and officially dissolved by Pope Clement V in 1312, with most of their remaining assets legally transferred to the Knights Hospitaller.
Teutonic Knights
Established as a hospital order during the Third Crusade to assist Germanic pilgrims, they quickly shifted to a purely military role, eventually moving their focus to the Baltic region to conquer and convert pagan lands. They were officially approved on February 19, 1199, by Pope Innocent III via the papal bull Sacrosancta romana. They never went extinct; after their Baltic crusader state collapsed, they evolved into a purely religious and charitable order that still exists today, headquartered in Vienna, Austria.
Order of Mountjoy
Created by Spanish knights in the Holy Land specifically to defend the towers of Jerusalem and the frontiers of Aragon against Iberian Moorish forces. They were officially approved in 1201 by Pope Innocent III via a papal bull confirming their unified rule. The order was later amalgamated; suffering from low recruitment, a large faction merged into the Knights Templar in 1196, while the remaining faction broke away to form the Order of Monfragüe, which was ultimately absorbed by the Order of Calatrava in 1221.
Order of Calatrava (Castile)
Formed in Castile to defend the crucial frontier fortress of Calatrava against Muslim Almohad forces during the Spanish Reconquista. They were officially approved on September 26, 1164, by Pope Alexander III via a definitive papal bull of confirmation. The order was ultimately suppressed and amalgamated; its political power was tied directly to the Spanish Crown in 1487, and while officially suppressed as a military entity in the 19th century, it survives today as an honorary Spanish noble companionate.
The Extended Frontiers
Knights of Saint Thomas (Acre)
An exclusively English order founded in honor of St. Thomas Becket that originally operated a hospital in Acre before transitioning into active combatants defending the Holy Land walls. They were officially approved on February 2, 1236, by Pope Gregory IX via a papal bull confirming their transformation under the military Rule of the Teutonic Knights. The order is now extinct; following the catastrophic fall of Acre, they retreated to Cyprus and eventually back to London, where they transitioned into a secular charitable fraternity before being dissolved during King Henry VIII’s Reformation in 1538.
Knights of Saint Thomas (Sword Form)
This distinct heraldic variation marks the 1228 militarization of the English knights, where the vertical sword was added alongside the cross to visually declare their new combat obligations to Christendom. They were confirmed under the same overarching 1236 papal bull by Pope Gregory IX. The order followed the exact trajectory of the main English order, dissolving under the Tudor secularizations of 1538.
Livonian Brothers of the Sword
Formed by the Bishop of Riga to forcefully convert pagan tribes across modern-day Estonia and Latvia during the Northern Baltic Crusades. They were officially approved on October 12, 1204, by Pope Innocent III via an official papal bull of confirmation. The order was later amalgamated; after being completely crushed by pagan Samogitians at the Battle of Saule in 1236, the surviving remnants were completely absorbed into the Teutonic Knights, functioning as the autonomous "Livonian Order."
Knights of Saint Thomas (Acre - Cross Potent Form)
This heraldic variant represents a brief, localized alignment where English knights in the Levant utilised a modified cross design to differentiate their armor from neighboring Templar and Hospitaller battalions. They were handled under the definitive 1236 papal confirmation by Pope Gregory IX. The design relocated and faded from use after the 1291 collapse of the Crusader states.
Order of Saint James of Altopascio
An Italian order focused on protecting bridges, roads, and travelers along the famous Via Francigena pilgrim route, stepping in militarily when bandits attacked. They were officially approved in 1239 by Pope Gregory IX via a papal bull assigning them the rule of St. Augustine for hospitaler-military protection duties. The order is extinct, having been suppressed in 1587 by Pope Sixtus V, with its vast property assets officially merged into the Order of Saint Stephen to combat Mediterranean piracy.
Row 3: The Specialised & Successor Factions
Order of Christ
Created exclusively in Portugal to act as a safe haven and direct continuation of the suppressed Knights Templar, protecting the Portuguese coastlines from Moorish raiding fleets. They were officially approved on March 14, 1319, by Pope John XXII via the historic papal bull Ad ea ex quibus. The order has since transformed; secularised by the Portuguese government in 1789, it operates today strictly as an honorary order of merit awarded by the Republic of Portugal.
Order of Monfragüe
Born out of the fractured remnants of the Order of Mountjoy that refused to merge with the Templars, defending the frontier of Castile. They were officially approved on May 23, 1199, by Pope Innocent III via an official papal bull of confirmation. The order was later amalgamated; due to low numbers and political pressure, it was completely absorbed into the larger Order of Calatrava in 1221.
Militia of Jesus Christ
A localised southern European order created to combat heresy and defend Catholic Church territories from internal rebellions across Languedoc and northern Italy. They were officially approved on May 18, 1235, by Pope Gregory IX via an official papal bull of confirmation. The order was later absorbed; it slowly phased out its military actions by the late 13th century and was entirely absorbed into the lay confraternities of the Dominican Order.
Santiago (León - Green Fleur-de-lis Roundel)
This specific green insignia denotes a regional administrative split utilised by the Order of Santiago during geopolitical friction between the competing kingdoms of Castile and León. They were validated under the global July 5, 1175, papal confirmation bull issued by Pope Alexander III. The variant was later re-unified into the singular grand order when the crowns of Castile and León permanently merged in 1230.
Order of Aviz
Originally founded as the Militia of Évora, these Portuguese knights defended the crucial strategic town of Évora against continuous Moorish incursions. They were officially approved in 1202 by Pope Innocent III via a papal bull confirming their adoption of the strict Cistercian monastic rule. The order has since transformed; secularized in 1789, it operates today as a military merit award presented by the modern Portuguese State.
Row 4: The Dynastic Orders
Order of Santiago
One of the most prestigious military orders in Spanish history, dedicated to protecting the vast networks of pilgrims walking the Camino de Santiago and fighting the Reconquista. They were officially approved on July 5, 1175, by Pope Alexander III via an official papal bull of confirmation. The order has since transformed; incorporated under the Spanish Crown in 1493, it was preserved as an elite noble association that continues to exist to this day under the Spanish monarchy.
Santiago (León - Black Cross Form)
A stylistic variant used exclusively on shields and armor by the knights of Santiago operating out of the Kingdom of León to differentiate command structures from the Castilian faction. They were shared under the overarching 1175 approval by Pope Alexander III. The variant was later re-centralized back into the unified red-cross heraldry following the 13th-century consolidation of the Spanish kingdoms.
Order of Dobrzyń
A tiny, highly specialized order founded by the Bishop of Prussia to protect Mazovia from violent raids by pagan Baltic Prussians. They were officially approved around 1230 by Pope Gregory IX via a papal bull confirming their autonomous crusading mandate. The order was later amalgamated; unable to stem the tide of pagan invasions alone, the majority of the knights merged directly into the Teutonic Knights around 1235, while a small faction was absorbed by the Order of the Hospitallers.
Calatrava (Castile - Flor Form)
The definitive, highly stylized evolution of the Calatrava cross. Adopted following their decisive victory at the Battle of Las Navas de Tolosa in 1212, this fleur-de-lis badge completely replaced their plain, older Greek cross designs. They inherited their status from the original 1164 papal foundation. The design remains preserved as the iconic, permanent heraldic badge of the order through to the modern era.
Order of the Holy Sepulchre
Established immediately following the First Crusade to guard and maintain the absolute sanctity of Christ’s Tomb in Jerusalem. They were officially approved in 1113 by Pope Paschal II as a religious chapter, later transitioning into a prominent chivalric military framework. The order survives completely intact; today, it operates as a prestigious equestrian order under the direct protection of the Holy See, dedicated to supporting Christian communities in the Holy Land.
Sources
The historical facts, dates, papal bulls, and lineage histories compiled in this timeline are drawn from foundational scholarly works on the crusading movements and medieval chivalric institutions:
Primary Papal Records & Documents
The Papal Bulls: Direct text transcriptions of Pie postulatio voluntatis (1113), Omne datum optimum (1139), and Ad ea ex quibus (1319) sourced from the Regesta Pontificum Romanorum (the official historical registry of Vatican papal documents).
Academic & Historical Literture
The Knights of Christ: Regulating the Military Orders in the Twelfth and Thirteenth Centuries by Dr. J. Schenk. (Detailing the transition of hospital groups into formal monastic-military rules approved by the Papacy).
The Military Orders: Fighting for the Faith and Caring for the Sick edited by Malcolm Barber. (Providing the historical baseline for institutional splits, mergers, and the exact dates of Iberian approvals like Calatrava and Santiago).
The English Crusaders in the Aegean and the Levant by Jonathan Riley-Smith. (Providing the structural timeline, militarization in 1228, and the 1236 papal confirmation for the Knights of Saint Thomas of Acre).
The Chronicle of Henry of Livonia (Translated by James A. Brundage). (Serving as the historical source for the foundation, papal approval in 1204, and the subsequent 1236 amalgamation of the Livonian Brothers of the Sword).