St Mary's (also St Mary the Virgin) is an Anglican parish church in Hay-on-Wye, Brecknockshire, Powys, Wales. Separated by a deep dingle, which probably was formerly a moat, it is situated westward of the town upon an almost precipitous eminence, near to the River Wye.

An earlier church, dedicated to St. John, called Eglwys Ifan, appears from the Notitia Cambro-Britannica, to have been in good repair in 1684, and then used as a school-house. This building partly fell down about the year 1700, and was never repaired, though part of it was later used as a school. The church of St Mary was resorted to thereafter. It was rebuilt and enlarged in 1884, in a great measure through the instrumentality of the Rev. Humphrey Allen, who was for a number of years curate of Hay. The small building consists of a nave and chancel, with a tower at the west end, containing one bell only.

St Mary's Church, Hay-on-Wye

Architecture

Sr Mary's consists of a nave and chancel with a square embattled tower at the west end. The nave is ceiled, and has a gallery on the north and west sides. The building is substantial but plain, and may be said to partake of that economic style of Gothic ecclesiastic architecture which prevailed during the first half of the 19th century. The tower, with the exception of the upper portion extending a few feet downward from the battlements, is of considerable antiquity, and although slightly out of perpendicular, is in substantial repair.

St Mary's Church, Hay-on-Wye

Both the interior and exterior of the church were repaired or restored in the mid-19th century, mainly through the efforts of Canon W. Latham Bevan, who was supported by the congregation and friends. The improvements were commenced 1866-7 by the erection of a porch at the principal entrance, and enlargement of the chancel by the addition of an apsis, of a horseshoe form, together with an organ chamber and vestry. The chancel was at the same time made available for seats, by the removal of a single arch of small proportions, which divided the chancel from the nave, and substituting the present three gothic arches, opening the full width of the chancel.

St Mary's Church, Hay-on-Wye

In form, the pulpit is octagonal; it is constructed of alabaster and marble, the lower part being arcaded and carried upon polished marble pillars; the upper portion is panelled in quatrefoils filled with medallions of our Saviour and the four evangelists. Round the pulpit is the following inscription: "Erected by Francis Robert Trumper, to the glory of God, in memory of his beloved wife Emma, who died Nov. 15th, 1865, and of her mother, Fortune Higgins, who died April 28rd, 1860."

In the 1870s, the pews were removed, substituted by open seats, and the former high front to the galleries replaced by one of a light and ornamental character. The latter portion of the work was effected in the years 1878–4.

Three stained windows in the apse, to the memory of Emma Meredith, were also presented by Trumper. The current stained windows include Scenes from the Passion of Christ (circa 1870) in the sanctuary apse, Abraham by the artist Arthur J. Dix (1906) on the south wall of the nave, adjacent to pulpit, and "Virgin and Child" (circa 1950) on the north wall of the nave.

Fittings

The silver chalice formerly used in the administration of the sacrament at Hay Church is an interesting relic, supposed to be of the date of about 1575; it has engraved upon it in rude letters the legend, "Our Lady Paris of the Haia" (Our Lady, or St. Mary, Parish of Hay). In 2010, a Victorian-era pipe organ was placed in the west gallery.

Monuments

Previous to the church being rebuilt, there stood within the wooden rails on the south side of the communion table, a tombstone upon the graves of several members of the Gwynn family; the slab is still preserved in the church, and appended is a copy of the inscription. At the top are the arms, in a lozenge quarterly, Brychan or Gwyn, and Boyle; round the inscription is a border of bine and leaves extremely well executed. "Here were interr'd the bodyes of Thomas Gwynn of ye Hay Castle Esq. Howell Gwynn his son and heir and ye vertuous and most charitable virgin Elizabeth Gwynn daughter and co-heir of ye said Thomas Gwynn. She founded an Almes house in the Hay for six poor people and endowed it with an anual gift towards their reliefe for ever. She departed this life the 12th day of May ano dni 1702." The living of Hay is a vicarage in the diocese of St. David's and archdeaconry of Brecknock. It is in the gift of Sir Joseph R. Bailey, Bart. The register of baptisms and deaths commences in the fourth year of James II.