St. Mary's Cathedral, Galle, Baroque revival cathedral in Galle District, Sri Lanka.

St. Mary's Cathedral is a baroque revival structure with high ceilings, symmetrical proportions, and detailed stone carvings that define its character. The interior features ornamental elements and crafted details that fill the space with visual richness.

The Jesuits built the cathedral at the end of the 19th century; the Italian source dates its completion to 1874, to a design by the Spanish Jesuit friar Benedict Martin. It became the seat of the Roman Catholic Diocese of Galle, whose first bishop was the Belgian Jesuit Joseph Van Reeth.

The cathedral is the seat of the Roman Catholic Diocese of Galle, whose first bishop was the Belgian Jesuit Joseph Van Reeth. Its dedication to the Blessed Virgin Mary under the title Queen of the Holy Rosary is recalled in the Sinhala name, Galla Santha Mariya Asana Dewu Mædura. The building was raised by the Society of Jesus, the order to which its designer, the Spanish friar Benedict Martin, belonged.

The cathedral stands within Galle's old town, close to the ramparts and the harbour, so it can be reached on foot from the fort gates. It is an active diocesan seat: entry is free but visitors should keep to the aisles during Mass and dress modestly, covering shoulders and knees.

The Italian sources credit the design to Benedict Martin, a Spanish Jesuit friar and architect, and date the building's completion to 1874. The Belgian Jesuit Joseph Van Reeth, later the diocese's first bishop, is a separate figure from the designer. The church is dedicated to the Virgin Mary as Queen of the Holy Rosary.