The Church of St Issui, Partrishow, is a parish church dating from 1060. The existing building was mainly constructed in the 14th and 15th centuries and was sensitively restored in 1908–1909. The church is most famous for its rood screen which dates from 1500. It is a Grade I listed building.
Issui was an early Welsh saint who lived by the well next to the site of the church. Following his murder, the well became a place of pilgrimage and the church was founded with the offerings of pilgrims in 1060. Gerald of Wales is reputed to have preached at the church in 1188 while on his tour of Wales. The church was undamaged during the Reformation, the dual altars being spared by the order of Edward VI in 1550. The church similarly escaped any large-scale Victorian reconstruction and was carefully restored by W. D. Caröe in 1908–1909. The church remains an active church in the parish of the Vale of Grwyne.
The church comprises a nave, chancel and porch with a separate shrine-chapel to the West. The walls are of rubble and the roofs of slate. The style throughout is Gothic. The wall to the right of the porch has a rare stone bench facing the preaching cross in the churchyard. The bellcote holds two bells and is a stone replacement by Caröe for the timber original.
The nave has a roof of the 16th century. It is windowless to the North, with windows of a Tudor date inserted in the South wall. The wagon roof of the chancel is a replacement by Caröe. The rood screen is the highlight of the interior.
In addition to the rood screen, the church has a significant collection of wall paintings. They comprise four groups: a Stuart Coat of Arms which the Royal Commission on the Ancient and Historical Monuments of Wales considers are those of James I; two groups of Biblical texts, including the Lord's Prayer, the Decalogue and the Apostles' Creed; and a 'Doom Figure' of Death as a skeleton with an hourglass in his left hand and a knife in his right, which dates from the 17th century.
References:The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.