The Dominicans came to Kraków from Bologna in 1222, brought by the bishop of Kraków, Iwo Odrowąż. Already in 1241, the Mongol invasion destroyed their first church dedicated to the Holy Trinity, which was the original parish temple of Kraków, given to monks after their arrival in the city. After its destruction, a new, Gothic church was erected. It began with the construction of the chancel, connecting it from the north with the monastery building. The presbytery of the Dominican church in Kraków was founded as one of the oldest long choirs in Europe, obtaining its final form around 1248 – 1251. Certainly it was completed in 1289, because then Prince Leszek the Black was buried there. The construction of the nave was completed until the beginning of the 14th century.
Probably in the 1360s, or at the beginning of the 15th century at the latest, the church was rebuilt from the hall to the basilica, while in the next 15th century the walls of the presbytery were raised, and Gothic chapels were added to the side aisles. In the first half of the 17th century, Baroque dome chapels were built in a different style. Along with the construction of the church, north of it, from the moment of its Dominicans arrival to the seventeenth century, the monastery buildings were shaped.
The great fire of Cracow in 1850 laid the end of the church’s splendor. The whole interior had gone all out, with the exception of some of the chapels, and the vault of the nave also fell. Despite the huge damages, the Dominicans decided to rebuild the church. The pillars were reconstructed almost from scratch, as well as the nave’s vaults. The work was completed in 1872, adding only a neo-Gothic porch just four years later.
The churches of the mendicant orders were open to all people, so this involved the necessity to divide the church into a part for monks and a part for the lay people. That’s why long choirs, that is a multi-bay presbyteries, clearly separated from the church’s naves began to be built and along the walls of the choirs, stalls, that is benches for monks, were placed. Originally in the second half of the thirteenth century, the presbytery of the church of Holy Trinity was covered with a rib vault, flowing down to the overhanging ancillary columns, alternately half-octagonal and semicircular. The floor was made of ceramic tiles. They were multi-colored (tin-brown, yellow and green), it had a glaze and embossed geometric (braid), floral (palmette) and figural (griffin, deer hunting) ornaments. Under the eastern side of the choir, there was a crypt, partly buried in the ground.
As a result of the reconstruction from the fourteenth / fifteenth century, during which the walls of the nave and chancel were raised, slender, three-aisle Gothic basilica was erected in the pillar-buttresses system characteristic for Kraków, with an elongated chancel ended with a straight wall. The western façade was topped with a slender stepped gable with pinnacles, and below there was a large ogival window pierced. The eastern wall of the chancel was also crowned with a high stepped gable with pinnacles and pierced with a large pointed window. Additional windows illuminated the chancel from the south, two per bay. The chancel and the nave were covered with a common gable roof, the side aisles had originally also gable roofs. The main entrance to the church led through the western ogival portal from around 1400, with rich sculptural decorations. Inside, the presbytery was covered with a net vault, a central nave with a stellar vault and aisles with rib vaults. The nave was open to the side aisles with ogival arcades.
The monastery buildings were situated on the northern side of the church. Their oldest, Romanesque building was the refectory, a room measuring 15.9 x 9 meters, built of irregular limestone (the so-called wild stone) and sandstone ashlar in the corners. It had two floors with a two-aisle room on a rectangular plan on the basement floor. It was divided into two parts by four massive, four-sided pillars, supporting cross vaults with the arch bands. The original height of the lower room did not exceed 2.3 meters, the plan was 5 x 15 meters, and the walls were about 1.4 meters thick. It was illuminated by small semicircular and rectangular windows in the northern, southern and eastern walls. Initially, it was accessible only through a barrel-vaulted passage with stairs on the west side. The room on the first floor, originally 4 meters high, with walls about 1 meter thick and covered with a wooden ceiling, was in the 15th century crowned with a cross-rib vault and covered with wall polychromes. From the eastern side, the access of light was originally provided by a triad of semicircular windows with an oculus in the middle, and an additional three Romanesque windows were pierced in the southern wall. There, near the western corner, there was an entrance portal: a three-step, closed semicircular, with a carved motif of a plant braid in the central part of the archivolt. The longer wall of the refectory was attached to the garth in the south. The cross-ribbed vaults of the cloisters were built in the 14th century.
The eastern range in the second half of the 13th century was a building measuring 11 x 44 meters with corners reinforced with buttresses and a chapter house protruding to the east. The range was situated at an unusual angle in relation to the church, which would indicate its earlier date of erection. It had two floors. In the ground floor there was a sacristy from the south, a 6-meter wide room, the aforementioned chapter house, a room 4.5 meters wide, a passage leading from the cloister to the monastery gardens, and two similar rooms 5 meters wide.
The chapter house, strongly protruding in front of the monastery’s façade, was originally slightly shorter (7.5 x 4.5 meters) and closed rectangularly at the height of diagonal buttresses (it was extended in the fourteenth century). Its facade faces the cloisters, in which the entrance portal was placed, flanked by two pairs of twin, narrow windows. The eastern part of the chapter house was closed with three sides, and the whole was covered with a rib vault.
The early Gothic period is related with a building with a plan similar to a square with a side of 10.5 meters. It had two floors, the lower one being a cellar partially recessed into the ground, with cross vault on the central pillar. The ground floor was 7 meters high, illuminated with ogival windows and probably also vaulted on a single pillar. This building may have housed the oldest libraria, connected with the theological study located next to it, or the winter refectory (relicts of the fireplace were here discovered).
At the end of the Middle Ages, the monastery buildings were concentrated around three garths: the largest southern one, the smallest centrally located, and the third, the youngest, located in the northern part. All three cloisters were connected by the 90-meter long east wing, running diagonally from the north-east to the south-west.
In the northern part of the eastern wing there is a strongly elongated late-Gothic, two-aisle hallway, topped with rib vaults based on three pillars. In its south-western corner there are stairs leading to a large corridor, descent to the basement under the refectory and a portal leading to the refectory. From the east to the Gothic hallway adjoins three rooms with a metric dating back to the 13th and 14th century. Originally there was a multi-storey, basement-free, brick building, covered with pilaster strips, erected on a rectangular plan with external dimensions of 21×10.8 meters. Its ground floor was divided into two rooms: the larger northern one and the smaller southern one (still existing as the treasury). Soon the larger room was divided into two more rooms. All were had vaults from the beginning, and the main entrance was in the central part of the west façade. The building was lit by a Romanesque two-light windows with rectangular jambs and a semicircle finials. The first floor was accessible by stairs hidden in the thickness of the west wall. There is no certainty what function the building had, perhaps it was a provincial theological study.
The perimeter walls of the 13th-century church have survived to this day. In its two southern windows of the presbytery, original traceries are visible, re-inserted after the walls were raised in the 15th century, but a large part of the architectural detail was destroyed during a fire from the 19th century. During the reconstruction, the facade was unfortunately obscured by a neo-Gothic porch, the western gable and the vault in the nave were also rebuilt. The monastery buildings in which numerous Romanesque and Gothic elements can be admired were more lucky.
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