• Built in the thirteenth century, the Church of St. Martin is listed in the Inventory of Historic Monuments.
• The Church of Jouy-en-Josas was the subject of many restorations : consolidation of the frame, attic and renovation of the slate roof of the tower, painting the nave and redevelopment of the square.
• It includes :

• A " Diège " the twelfth century.
• A marble St. Sebastian, attributed to Pierre Puget (seventeenth century).
• Four stalls carved wooden choir (XVI century).
• The group of Charity of Saint-Martin (XVI century).
• An organ built by the prestigious Abbey factor in 1890 and restored in 1974.