The existence of the parish of Droisy, dedicated to Saint Martin, is attested from the earliest days of the conversion of the Gauls. In the 10th century, the Counts of Chartres and Blois donated this church to the Abbey of Saint-Lomer de Blois, which preserved it until the French Revolution.
Rectangular in plan, the building was built of flint in the 13th century. From this period, the western doorway, with its pointed arch and double row of beveled keystones, the two arched and beveled windows located to the north of the nave, and the large pointed bay window of the flat chevet, whose tracery has disappeared, still survive. The inverted keel vault dates from 1656. In 1785, the south wall of the nave was partially rebuilt in flint blocks with quoins and arched brick windows. During the same restoration campaign, the quadrangular bell tower with an octagonal spire, which surmounts the roof to the west of the nave, was rebuilt. A porch precedes the portal.
The church retains some interesting furnishings. The high altar is particularly noteworthy. It was probably made in 1765 by Ildevert Canteloup, a master carpenter from Saint-Germain-sur-Avre. Columns with Corinthian capitals frame a painting illustrating the theme of the "charity of Saint Martin." The two side altars, arranged slightly obliquely, are of the same style. The northern one is dedicated to the Virgin Mary, and the southern one to Saint Sebastian. The communion table and the woodwork separating the choir from the sacristy were also executed in the 18th century. The seigneurial pew of Charles du Buc-Richard dates from the 17th century. A wealth of statuary completes this ensemble. Some decorative fresco motifs remain.
For the roof repair work, the Sauvegarde de l'Art Français (French Art Protection Agency) awarded a grant of 17,000 francs in 1997.