# Church of St John of the Collachium

The Church of St John of the Collachium was a medieval church built by the Knights Hospitaller in Rhodes, capital of the island of the same name. It was built in the first half of the fourteenth century and dedicated to the order's patron, John the Baptist. It was the conventual church of the Hospitallers, immediately adjacent to the Palace of the Grand Master, and presided over by the order's most senior religious official. It was used for religious services and processions, meetings of the order's chapter general, and for the elections and funerals of its grand masters.
Architecturally, the church was in the Gothic style, 48–50 metres (157–164 ft) in length and 15–18 m (49–59 ft) in breadth. It was expanded in several phases, adding underground areas and a total of eight annexes, including several chapels. At least six Hospitaller grand masters were buried in the church, including Fabrizio del Carretto, whose elaborate funerary slab was placed in its central part. The church became famous for its collection of relics, which included objects associated with John the Baptist, Jesus, the Virgin Mary, and various other saints.
After the Ottoman conquest of Rhodes in 1522, the church became the town's main mosque. The building was damaged by two earthquakes in the nineteenth century, and destroyed on 6 November 1856 by a lightning strike which ignited gunpowder stored in its cellars, killing at least 200 people. In modern times, only small parts of the northern and eastern foundations remain, and the site has been built over with a school. Archaeological investigations of the site took place in 1932 and 1934 under Pietro Lojacono, in 1988, and under Anna-Maria Kasdagli in 1995.

## Architecture
### Construction

The Church of St John was built in the collachium ('convent'), an area in the northern part of the town of Rhodes based on the walled Byzantine town and inhabited by the Hospitallers. The collachium was set apart from the burgus, the area of the city resided in by local inhabitants. The church was in the north-west part of the city, adjacent to the Grand Master's palace. It was dedicated to John the Baptist, the patron of the Knights Hospitaller. The site was previously occupied by an older church, which contained burials dating from the second half of the thirteenth century.
Construction of the church began shortly after the capture of the city of Rhodes by the Knights Hospitaller in 1310. A manuscript reported by the Flemish army officer Bernard Rottiers [nl], who visited the church in 1828, was said to record that Foulques de Villaret, who was Grand Master between 1305 and 1319, laid the foundation stone on 24 June 1310, the Feast of the Nativity of John the Baptist, though the authenticity of this manuscript is now doubted. Construction seems to have finished under Foulques's successor, Hélion de Villeneuve, who was Grand Master until 1346 and whose coat of arms was carved into the church's north wall. Instructions for the staffing and the services of the church were laid down in the statutes of the order's legislative body, the chapter general, on 4 November 1314; a meeting was held in the church in 1318 to appoint a delegation to meet with Pope John XXII, and a woman who died in the same year was interred in a passageway underneath the church. Underground spaces were constructed beneath the main structure, one of which led to the loggia (covered gallery) between the church and the grand master's palace; these may variously have been crypts, storage rooms or chapels.

### Physical description

The historian Sofia Zoitou has characterised the architecture and contents of the Church of St John as "eloquently articulat[ing] the Knights' political and religious essence". It was built in the Gothic style, 48–50 metres (157–164 ft) in length and 15–18 m (49–59 ft) in breadth. It was constructed as a three-aisled rectangular basilica: its transept was around 25 m (82 ft) long, its central nave was 6.9 m (23 ft) in width, and the south aisle 4.15 m (13.6 ft) wide. The transept and sanctuary were covered with four ribbed vaults: the roof of the aisles was made of timber, while the nave was roofed with a coffered barrel vault. Between the aisles were arcades, with pointed arches and a total of eight granite columns, spolia reused from an ancient building: the columns' capitals were carved in the classical Corinthian and Doric orders, and one of their bases had an inscription in Ancient Greek.

## History

The Church of St John was the conventual church of the Hospitallers, and among the largest in the city. Its priest, the Grand Prior of the Convent, was the most senior Hospitaller priest, a member of the order's council, and had responsibility for the knights' religious affairs. The Grand Prior could be a member of any of the order's seven langues ('tongues'), loose ethno-linguistic groupings denoting members' origins in western Europe. The church was used for all of the order's religious services, for meetings of the chapter general, and for the elections, funerals and burials of grand masters. Several annual processions on religious feast days, including the anniversary of the Hospitallers' conquest of Malta, concluded at the church.
The fourteenth-century pilgrim Nicholas de Martoni described the church as small, but a "great place of piety". During the fifteenth century, priests for the church were summoned to Rhodes by the Hospitallers from Catholic parts of Europe. Between 1435 and 1439, the Spanish traveller Pero Tafur visited Rhodes, and noted that the church was filled with relics, and used both for religious services and for meetings of the Hospitallers. The church's organ was made in Venice and brought to Rhodes in 1476. In 1489, the Hospitaller Grand Master Pierre d'Aubusson was installed as a cardinal in the church.
Between the fourteenth and the sixteenth century, the church was mentioned in several guides for western European pilgrims, who would use Rhodes as a stop on journeys to the Holy Land. It was also depicted in miniatures of the same period. It was expanded in several phases, adding a total of eight annexes, over the period of Hospitaller rule on Rhodes. Most of these expansions involved the addition of chapels, though the overall schema and ground plan remained much as it had been in the fourteenth century. By 1479, these additions included a structure which was believed to contain the body of St Euphemia.
Of the thirteen Hospitaller grand masters who died on Rhodes, at least six are believed to have been buried in the church: Fabrizio del Carretto, who died in 1521, was entombed beneath an elaborate slab in its central part; the tomb of Dieudonné de Gozon, the successor of de Villeneuve who died in 1353, was probably near its main altar, while parts of the tombs of Pierre de Corneillan (died 1355), Robert de Juilly (died 1376), Jacques de Milly (died 1461) and Giovanni Battista Orsini (died 1476) were transferred to the Musée d'Orsay in Paris in 1877, following the church's destruction. The church's bell tower, which included a clock by 1522, was probably repaired or rebuilt around the turn of the sixteenth century, possibly to repair damage from the failed Ottoman siege of 1480 and the earthquake of 1481.
After the Ottoman conquest of Rhodes in 1522, the church became the town's main mosque, and a mihrab (niche) was added to it. The bell tower was partly destroyed in the Ottoman siege, and replaced with a minaret. Non-Muslims were forbidden to enter the mosque until the nineteenth century. Ludwig Ross, a German archaeologist and former ephor-general of antiquities of Greece, visited in 1843, and noted an ancient Greek inscription, several defaced tombs of Hospitaller knights, and images of the Apostles of Jesus in several niches. An earthquake in 1851 caused the top part of the belfry to collapse, while a further earthquake in 1856 destroyed the minaret. The British archaeologist Charles Newton visited the site during his consular service on Rhodes in April 1853, and wrote a description of the building: he commented that the wooden roof was painted in blue and decorated with stars, while stained-glass windows with escutcheons of the knights, noticed by Rottiers in 1828, were no longer present. Rottiers also described and illustrated the tomb slab of del Carretto.

## Treasures

The Church of St John housed the Hospitallers' main collection of relics, which was probably moved there upon the church's construction. This collection included relics taken by the knights in Palestine, during their period in the Levant (until 1291), as well as the relics formerly held by the Knights Templar, which were given to the Hospitallers in 1313 after the Templar order was dissolved in 1312.
The first attested mention of this collection was made by Ludolf von Sudheim, a German priest who visited Rhodes on a journey to the Holy Land between 1336 and 1341. Von Sudheim recorded the presence of a bronze cross, believed to have been made from the bowl used by Jesus to wash the feet of his disciples. From the late fourteenth century, prompted by a loss of revenues caused by the Papal Schism of 1378, the Hospitallers took greater care to expand, curate and promote their collection of relics as a means of generating income from pilgrims visiting Rhodes. The collection became famous: it was described in several pilgrims' accounts, and listed in the Santa parola ('Holy Words'), a litany dating from 1389–1475, read by sailors and outlining the holy sites along the route of their voyage. Pilgrims' accounts recall that the relics were held in the church's sacristy and displayed in silver and gold monstrances.
The church's relics included objects associated with the Virgin Mary and various other saints. These included the right hand of John the Baptist: the hand is attested in the church from 1413, though other sites also claimed to possess the same relic, and a relic purporting to be the same object was ceremonially sent to the Hospitallers by the Ottoman sultan Bayezid II in 1484. The Hospitallers investigated and satisfied themselves of the authenticity of the hand send by Bayezid, and it was housed in a gold reliquary, decorated with pearls and precious stones, donated by d'Aubusson, the grand master. Other relics included a bowl used by Jesus, a large piece of wood believed to be from the True Cross – brought by the Hospitallers from the Levant – and one of the thirty pieces of silver paid to Judas Iscariot to betray Jesus. This coin was reported to be in Rhodes from the mid-fourteenth century; from the late fifteenth century, wax and sometimes metal copies of it were made and given to pilgrims. Pilgrims' descriptions of the coin suggest that it was probably a drachm or didrachm of the Hellenistic period, minted on Rhodes between 360 and 230 BCE.
By the early sixteenth century, other treasures held by the church included gilt statues of the Apostles, situated around the altar; either thirteen or sixteen silver lamps; and a gold statue of the agnus dei, donated by Charles Alleman de Rochechinard during the grand mastership of Emery d'Amboise, between 1503 and 1512. The church also held a set of silver-gilt kneeling angels, which was placed on the altar during major events. By 1474, it had a chalcedony basin with a silver-gilt rim, used for the lavabo (ceremonial washing of the priest's hands) during services, a silver or silver-gilt image of the Virgin Mary with the baby Jesus, and another of John the Baptist holding the agnus dei. In the early fifteenth century, it was recorded as holding a garment belonging to the Virgin Mary, and as possessing one of her shoes in 1519. It also held body parts – chiefly arms and heads – said to belong to various saints: these included, by 1350, the arms of St George, St Stephen and St Anthony. Over the course of the fifteenth and early sixteenth century, the collection expanded considerably, encompassing relics from, among others, St Andrew, St Polycarp and St Thomas Becket, as well as a finger of Mary Magdalene.

## Destruction

The building was destroyed on 6 November 1856 by an explosion after lightning struck gunpowder stored in the cellars of its bell tower. At least 200 people were killed, and the explosion damaged nearby houses as well as the adjacent Palace of the Grand Master.
The amateur archaeologist Alfred Biliotti, who was serving as a consular official for the United Kingdom on Rhodes, conducted an impromptu excavation to rescue survivors. Building materials, particularly marble floor slabs, were salvaged from the site, and the tomb of del Carretto was looted. The site was built over with a school: pieces of the destroyed structure were used in the construction. A second school building, in the neoclassical style, was built to replace the first around 1898.
In modern times, only small parts of the northern and eastern foundations of the church can be seen. The Church of the Annunciation at Mandraki (the main harbour of Rhodes) was built under the Italian architect Florestano Di Fausto between 1924 and 1929, reconstructing what was then believed to be the form of the Church of St John.

## Archaeological study

Italy ruled the Dodecanese from 1912 until 1945; in 1932 and 1934, the engineer Pietro Lojacono made small-scale archaeological studies of the church's ruins. Further archaeological work took place in 1988, after heavy rain caused the collapse of a revetting wall, uncovering a tomb underneath the central part of the church. The tomb contained grave goods, including a hoard of 190 coins dated to between 1488 and 1503, but no skeleton was found, leading to the suggestion that it may have been a child's grave. Further excavations took place in 1995, under Anna-Maria Kasdagli, uncovering the bases of the granite columns in the arcades and demonstrating their status as spolia. These excavations also investigated a tomb considered to be that of Fabrizio del Carretto.