Kilarow Parish Church is a rare round church commenced in 1767. Daniel Campbell the Younger brought Thomas Spalding to Islay for the specific purpose of building the church which was completed in 1769 and is therefore, in Islay, the oldest church building in which public worship takes place on a weekly basis. The Round Church is 18.2 metres in diameter and the walls are 0.85 metres thick. The main central pillar is 0.48 metres diameter at the base and is of timber, harled and plastered. The gallery of the church, which is 'U' shaped in plan, was added c.1830 and in some ways defeats the concept behind the original circular design whereby 'there were no corners in the church in which the Devil could hide.' The Round Church is open daily and well worth a visit.
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.