Origins of St. John’s Co-Cathedral
Foundation and Construction
After the Great Siege of Malta in 1565, the Knights of St. John established Valletta as their new fortified city.
Grand Master Jean de la Cassière commissioned a new conventual church for the Order, dedicated to their patron saint, St. John the Baptist.
Construction began in 1572, under the direction of Gerolamo Cassar, the leading Maltese military and civil architect of the time.
The church was completed by 1577, built in the Mannerist style, characterized by its fortress-like exterior — plain, severe, and almost militaristic, reflecting the Knights’ character.
Early Appearance
Cassar’s design featured a rectangular plan with side chapels, a plain stone façade, and two symmetrical bell towers.
Unlike its later splendor, the interior was originally very austere, with simple limestone walls.
The cathedral primarily served as the conventual church of the Knights, hosting daily Mass and important ceremonies.
The Baroque Transformation
In the 17th century, Grand Masters and wealthy Knights sought to glorify their order through art.
The Calabrian painter Mattia Preti (1613–1699) was commissioned to transform the interior.
Between 1660 and 1666, Preti painted the magnificent vaulted ceiling and walls with scenes from the life of St. John the Baptist.
He also redesigned the interior architecture, covering walls with carved stone reliefs and gilded ornaments.
The transformation made St. John’s one of the most ornately decorated Baroque churches in Europe.
Tombs and Funerary Role
The cathedral became the burial place of the Knights of the Order of St. John.
Its marble-inlaid floor is a giant funerary monument, covering over 400 tombstones of knights, nobles, and grand masters.
Each inlaid slab features heraldic designs, Latin inscriptions, and symbols of the deceased’s achievements.
Artistic Masterpieces
The Oratory of St. John’s Co-Cathedral holds two masterpieces by Michelangelo Merisi da Caravaggio (1571–1610):
The Beheading of Saint John the Baptist (1608): Caravaggio’s largest painting, and the only one he ever signed.
Saint Jerome Writing: Another dramatic work showcasing his mastery of light and shadow.
These paintings were commissioned while Caravaggio was in Malta as a knight of the Order (1607–1608).
The Cathedral’s Role in the Order
Each chapel was dedicated to one of the Langues (national groups) of the Order: Italian, German, Aragonese, English, etc.
It became the spiritual heart of the Order of St. John, hosting ceremonies, chapter meetings, and funerals.
The cathedral symbolized both the religious devotion and the power of the Knights.
Later Centuries
During the French occupation (1798–1800), the cathedral was stripped of some treasures, but many artworks survived.
Under British rule, it retained its importance as a religious monument.
In 1816, Pope Pius VII granted it the status of a Co-Cathedral, sharing the bishop’s seat with St. Paul’s Cathedral in Mdina.
Modern Era
Today, St. John’s Co-Cathedral is both an active place of worship** and a **museum of Baroque art.
Extensive restoration projects have preserved its structure, paintings, and tombstones.
It stands as one of Malta’s most visited landmarks, admired for its historical, cultural, and artistic significance.
Legacy
St. John’s Co-Cathedral is not just a church, but a symbol of Malta’s role in European history — where faith, art, and military power converged. Its transformation from a plain conventual church to a Baroque masterpiece reflects the grandeur of the Knights of St. John, whose influence shaped Malta’s destiny.