Kon-Katidral ta’ San Gwann (St. John’s Co-Cathedral) in Valletta is Malta’s Baroque jewel, built by the Knights of St. John between 1573–1578 and dedicated to St. John the Baptist.
Historical Background
Founder: Commissioned by Grand Master Jean de la Cassière after the Great Siege of 1565.
Architect: Girolamo Cassar, who also designed many of Valletta’s key buildings.
Consecrated: 20 February 1578.
Original Role: Conventual church of the Knights of St. John, replacing St. Lawrence’s in Birgu.
Architectural Highlights
Exterior: Mannerist style, austere and fortress-like, reflecting military discipline.
Interior: Transformed in the 17th century into one of Europe’s finest Baroque masterpieces, richly decorated by Mattia Preti.
Floor: Marble tombstones of over 400 Knights, each inlaid with coats of arms and allegorical imagery.
Oratory: Houses Caravaggio’s The Beheading of St. John the Baptist — his largest and only signed work.
Chapels: Each Langue (division) of the Order had its own chapel, adorned with unique iconography.
