Pula Cathedral is a Roman Catholic church that stands on a site of the much older historic church. It is hard to say when first Christian communities appeared in Pula. For the first three centuries Christians were hunted and killed by the Roman officials. The first Pula Cathedral was erected on this spot in the 4th century AD. It was a site for worship, celebration and in time of danger last refuge. After Christianity became a legal religion in Roman Empire (Edict of Milan - 313 AD) Pula Christians created a large place of worship. After a devastating fire of 1242 Pula Cathedral was reconstructed. Although the roof and parts of the church were fixed, the base was kept pretty much untouched. Fragments of mosaics dating to 5th and 6th centuries AD are still visible today. Additionally Pula Cathedral keeps a Roman sarcophagus that dates back to the 3rd century AD. Apparently it houses the remains of the unknown Christian martyr that was killed during one of the waves of Christian persecutions. The bell tower of the cathedral was constructed in the 17th century from stones that were quarried at the Pula amphitheater.
Roman and Pre-Christian Origins (Pre-4th Century AD)
The site has
hosted religious activity since ancient Roman times. Archaeological
evidence shows ruins of Roman thermae (public baths) beneath the
cathedral. Local tradition and excavations suggest it may have
originally held a temple dedicated to Jupiter Conservator. During the
Diocletianic Persecution (late 3rd to early 4th century AD), when
Christianity was outlawed in the Roman Empire, secret Christian
gatherings likely took place in the baths or nearby structures. This
clandestine use set the stage for the site's transformation once
Christianity was legalized under Emperor Constantine.
Early
Christian Foundations and 5th-Century Complex (Late 4th–6th Centuries
AD)
The first Christian buildings appeared in the late 4th and early
5th centuries. Construction began with a small church whose width
matches the current central nave of the cathedral. This was soon joined
by a single-nave church dedicated to St. Thomas (the patron saint of
Pula and the diocese), built adjacent to it. By the early 5th century,
these were incorporated into a larger extended hall church. In the
second half of the 5th century, the complex expanded into a full
three-nave basilica featuring characteristic northern Adriatic
architectural elements: an apse integrated into the facade and a
completely flat rear wall.
At the same time, a baptistery (initially
cross-shaped in plan, later associated with an octagonal or hexagonal
font) and a bishop’s residence were built in front of the basilica. The
early cathedral was richly decorated with frescoes and elaborate floor
mosaics. One surviving mosaic fragment, near the altar area, bears the
inscription “DAMIANUS ET LAVRENTIA,” indicating it was a votive gift
from a couple (likely for their wedding vows). Fragments of
5th–6th-century mosaics, including one depicting the Virgin Mary, still
survive today.
Pula became an episcopal see in the 6th century
(initially under the Archbishops of Ravenna, later the Patriarchs of
Aquileia). The first documented bishop, Antonius, served from 510 to 547
AD. These early structures formed the foundational layout that later
buildings would expand upon.
Medieval Period: Reconstructions,
Damage, and Growth (7th–15th Centuries)
In the 9th century, during
the reign of Bishop Handegis (857–862 AD), an additional entrance was
added to the southern wall (its outline remains visible today, though
now walled up). An inscription once thought to mark new construction is
now interpreted as part of his gravestone, referencing the suzerainty of
Holy Roman Emperor Louis II.
The cathedral suffered significant
damage in 1242 during a Venetian raid and subsequent fire. Full repairs
were not completed until the 15th century, when the present-day sacristy
was added and other modifications (including some Gothic elements) were
made. A south chapel may date to the 13th century. In 1487, Bishop
Ursini consecrated the main altar. Five sarcophagi discovered beneath
the altar in 1675 were said to contain relics of early Christian saints
(Ss. George, Theodore, Demetrius, Basil, and Flora) along with remains
possibly linked to Solomon, King of Hungary (r. 1063–1074). While some
identifications remain uncertain, St. Flora (a 9th-century martyr from
Córdoba) is confirmed.
Baroque and Early Modern Transformations
(17th–18th Centuries)
Major visible changes occurred in the late 17th
and early 18th centuries. In 1707, a free-standing Baroque bell tower
was constructed adjacent to the (then still-standing) 5th-century
baptistery. Its lower sections prominently reuse stone blocks quarried
from Pula’s famous Roman amphitheater (Arena)—a common practice of
material recycling in the region. The tower’s design and the cathedral’s
exterior largely date from a comprehensive redesign begun in 1707 and
completed over the following century.
In 1712, under Bishop Giuseppe
Maria Bottari, a Neoclassical (classicist) facade was added as part of
broader reconstruction works on the basilica and bell tower. These
efforts continued intermittently until around 1924. The interior retains
a long, simple nave lined with side chapels, stone columns, and
restrained decoration, including a painting of the Assumption of the
Virgin. The overall effect is austere and contemplative rather than
ornate.
19th–20th Centuries: Discoveries, Demolitions, and Wars
The diocese seat moved to Poreč in 1828, after which the adjacent
baptistery and bishop’s residence were demolished in the 19th century
(baptistery gone by around 1850–1885). 19th-century historian Pietro
Kandler’s drawings preserve its appearance, showing a font similar to
that in Poreč’s Euphrasian Basilica.
Archaeological finds continued:
In 1860, a stone sarcophagus yielded a silver box decorated with images
of Aquileian bishops St. Hermagoras and St. Fortunatus, plus a smaller
golden reliquary possibly containing relics of St. Thomas the Apostle
(traditionally believed to have been brought from Constantinople in the
5th century). These items are now housed in Vienna’s Kunsthistorisches
Museum.
During World War II, Allied bombing raids heavily damaged the
cathedral. It was carefully repaired and restored by 1947, preserving
its historic fabric.
Present Day and Significance
Today, Pula
Cathedral functions as a co-cathedral (alongside Poreč’s Euphrasian
Basilica) in the Roman Catholic Diocese of Poreč-Pula. It remains an
active parish church, open to visitors year-round (free entry). Its
modest, peaceful interior—softly lit, with worn stone floors and simple
volumes—invites quiet reflection. The structure exemplifies
architectural layering: a 5th-century early Christian basilica core,
Romanesque solidity, Gothic and Baroque accents, and a Neoclassical
facade, all built atop Roman foundations.
The cathedral evolved through several distinct phases:
Late
4th–mid-5th century: A small church (matching the width of today’s
central nave) was built first, followed by a single-nave Church of St.
Thomas nearby. These were merged into an extended hall church in the
early 5th century.
Second half of the 5th century: It was expanded
into a classic three-nave basilica, typical of northern Adriatic Early
Christian architecture. Key traits include the apse placed flush with
the facade (rather than the traditional eastern end) and a completely
flat rear wall. A cross-shaped (or octagonal) baptistery and bishop’s
residence were added in front; both were later demolished (baptistery in
1885, residence in the 19th century after the diocese moved to Poreč in
1828).
9th–15th centuries: The structure retained its Early Christian
footprint. Bishop Handegis (857–862) added a southern entrance (now
walled up but still visible in outline). A major Venetian raid and fire
in 1242 damaged it, leading to 15th-century repairs that added the
current sacristy and introduced Gothic elements.
1707–1924: The
free-standing Baroque bell tower was erected in 1707, and the present
classicist facade was added in 1712 under Bishop Ottavio Bottari.
Extensive reconstruction continued until 1924.
20th century: Allied
bombing in World War II caused heavy damage; repairs were completed by
1947.
Exterior Architecture
The cathedral presents a modest
yet historically rich exterior dominated by its Romanesque core, later
refined in Renaissance/Neoclassical and Baroque styles.
Facade
(1712): A symmetrical, austere classicist (Neoclassical) design with a
prominent triangular pediment, pilasters, and restrained ornamentation.
It blends with the older Romanesque volumes while giving the front a
grand, ordered appearance. Some sources describe Renaissance influences
in its proportions and forms.
Overall Form: A three-nave basilica
with solid, unadorned walls, rounded arch openings, and a flat rear
elevation (a hallmark of 5th-century northern Adriatic design). The
building has an elongated oblong plan; the central nave preserves the
width of the earliest 4th/5th-century church. Side walls show layered
masonry from multiple eras, with some Gothic tracery in aisle windows.
Bell Tower (1707): A massive, free-standing Baroque campanile rises
beside the cathedral. Built using stone blocks salvaged from the nearby
Roman Pula Arena (Amphitheater), it adds a vertical accent and visually
links the structure to Pula’s ancient Roman heritage. It was completed
and refined during the 18th–early 20th-century campaigns.
The
ensemble creates a striking juxtaposition: ancient basilican roots,
Romanesque massing, and elegant 18th-century additions, all set against
the bay.
Interior Architecture and Features
The interior feels
spacious yet restrained—simple, contemplative, and focused on its Early
Christian and Romanesque bones rather than ornate decoration.
Layout: A three-aisled basilica with a wide central nave flanked by
narrower side aisles and side chapels. Two rows of antique columns
(reused from Roman structures) divide the space, supporting rounded
arches that give the Romanesque character. The altar area sits in a
semi-circular apse at the northern end (integrated into the facade
externally).
Columns and Capitals: The antique columns feature
finely carved capitals. Close inspection reveals subtle religious scenes
and symbolic motifs carved by medieval and earlier craftsmen.
Floor
Mosaics: Fragments of 5th–6th-century floor mosaics survive near the
high altar, protected behind railings. One notable section bears the
inscription “DAMIANUS ET LAVRENTIA,” recording a couple who funded the
pavement as part of their wedding vows. These are among the oldest
preserved Christian mosaics in the region and include geometric patterns
and figurative elements typical of Early Christian art.
Main
Altar: The high altar is a 3rd-century Roman sarcophagus repurposed to
hold relics of early Christian saints (including Ss. George, Theodore,
Demetrius, Basil, Flora, and others). It underscores the cathedral’s
deep Roman and Early Christian continuity.
Decoration and Atmosphere:
The interior is relatively plain—worn stone floors, soft natural light
through high windows, and restrained wall treatments. Original Early
Christian frescoes and extensive mosaics once covered the walls and
floors, but only fragments remain. A notable painting of the Assumption
of the Virgin hangs inside, reflecting the dedication. Side chapels and
the 15th-century sacristy add layered depth.
Unique Architectural
Characteristics and Influences
Northern Adriatic Early Christian
Traits: The facade-integrated apse and flat rear wall are rare and
regionally distinctive, reflecting 5th-century liturgical and urban
planning practices.
Material Reuse: Roman stones (from the Arena and
possibly the temple) and columns create a direct link to antiquity.
Style Evolution: Early Christian basilica → Romanesque solidity (rounded
arches, massive walls) → Gothic repairs (15th century) → Baroque bell
tower → Neoclassical facade. This makes it a textbook example of Istrian
ecclesiastical architecture.
No major dimensions are widely
published, but the central nave is notably wide and elongated, giving a
sense of processional grandeur despite the modest scale compared to
larger European cathedrals.