St John's Co-Cathedral Valletta: Visitor Guide 2026

St John's Co-Cathedral in Valletta is the defining interior of Malta – a Baroque church built by the Knights of St John in the 1570s, with gilded stone carvings on every wall, a floor of 375 polychrome marble tombstones, and two original Caravaggio paintings in the oratory. It looks austere from the street; inside, it is one of the most extraordinary rooms in the Mediterranean.

Why it is called a Co-Cathedral

The title Co-Cathedral reflects a historical arrangement: Malta has two cathedrals of equal standing. The original cathedral of the Diocese of Malta is in Mdina – Malta's former capital – and dates to the medieval period. When Valletta became the new capital in the 16th century, the Knights' church was elevated to cathedral status, but neither church was demoted. Both hold the title simultaneously: Mdina Cathedral and St John's Co-Cathedral.

The distinction is largely administrative. In practice, St John's is the more visited of the two, owing to its location in the capital and the presence of the Caravaggio paintings.

The exterior and the nave

From the street, St John's looks like a fortress. The façade is flat, symmetrical and almost entirely undecorated – a deliberate choice by the Knights, who did not want a conspicuous church visible from approaching ships. The twin bell towers are the only ornamental element.

The interior is the complete opposite. The architect Mattia Preti transformed the nave in the 1660s using trompe-l'œil painting on the barrel-vaulted ceiling – 18 scenes from the life of St John the Baptist, rendered in warm ochre and gold. The walls are carved limestone, gilded in the upper sections. The overall effect, moving from the plain entrance door to the full nave, is one of deliberate theatrical contrast.

The floor runs the full length of the nave and side chapels: 375 individual tombstones of Knights, each commissioned by the knight's own langue and family, in multi-coloured marble inlay. No two are identical. Walking the entire length takes time if you stop to read the inscriptions.

The side chapels

Eight side chapels line the nave, each dedicated to one of the langues of the Knights of St John – the national groupings into which the order was divided. The langue of Italy, Aragon, Castile, France, Germany, England, Provence and Auvergne each decorated their own chapel.

The level of ornamentation varies considerably. The Italian chapel is considered the most elaborate, with detailed marble work and paintings. The German chapel is also notable. The chapel of England is quieter – England's langue was suppressed after the Reformation and its chapel was less developed.

Each chapel has its own altarpiece, usually a large-format painting by a Baroque master. The overall effect of moving through the chapels is of eight distinct artistic programmes, commissioned independently and then arranged in sequence.

The Caravaggio paintings

The oratory, at the far end of the church, contains the two works that draw most visitors: Caravaggio's The Beheading of Saint John the Baptist (1608) and Saint Jerome Writing (also 1608).

The Beheading is Caravaggio's largest canvas – around 3.6 metres by 5.2 metres – and the only painting he ever signed. The signature is painted into the blood pooling from the saint's severed neck: f. Michel Angelo (the 'f' standing for fra, brother, a title Caravaggio briefly held as a Knight of Obedience). The painting is striking for its scale and its emptiness: the action takes place in a prison courtyard, with vast dark space above the figures.

Photography is not permitted in the oratory. The prohibition is enforced.

Saint Jerome Writing shows the saint at a desk, with a skull beside him – a memento mori. It is smaller than The Beheading and more intimate. Both paintings were commissioned by Grand Master Alof de Wignacourt during Caravaggio's time in Malta, which lasted roughly a year before he fled following a brawl with a fellow Knight.

Practical: getting there and dress code

St John's is in the centre of Valletta, a short walk from the main bus terminus at City Gate. It is the natural anchor for a Valletta half-day or full day – pair it with the Upper Barrakka Gardens for the Grand Harbour views and the Grand Master's Palace nearby.

The dress code is firm: shoulders and knees must be covered. Staff at the entrance provide scarves if needed, but wearing appropriate clothing avoids the delay. Admission with an audioguide is the standard option; check current ticket prices at the official website.

Photography in the oratory is prohibited – keep your phone in your pocket once you pass through.