The ruined St Lonan's parish church is thought to be on the site of an early medieval keeill or chapel, which would have been in use between circa AD500 and AD1000.   Lonan Old Church is dedicated to the Irish saint, Adamnan of Iona, or the shortened version, 'Onan'. The church fell into a ruined condition, but the eastern end has been restored for use as a place of worship.  The building is orientated east-northeast to west-northwest and measures 17.3 metres by 6.7 metres. The western 10.0 metres is now roofless with walls averaging 0.9 metres thick and generally to their original height with a doorway in the south and window in the west.  The remainder has been restored and is walled off from the ruin and is used for divine service while burials have taken place quite recently in the surrounding grave yard. In the interior of the ruined portion of the church and affixed to the north wall are 6 crosses or portions of crosses from the surrounding area. They bear inset bronze plaques with their cross number and a notice dates them collectively from the 7th to the 9th century.

This small slab is probably derived from the chapel and burial ground (Keeill Abban, IOMHER 0722.00) which occupied the site prior to the construction of St Luke's Chapel. It is now built into the east gable. One face shows a plain cross within an almost square frame. The horizontal arm has bulbous terminals, while the ends of the vertical limb run into the surrounding border.

A slab with plain cross incised within a square was found here in 1915, built into the west gable of St Luke's Chapel. It measures 45.75 centimetres x 35.5 centimetres.  A cast is kept in the Manx Museum.

The chapel of St Luke's was built in 1836, on the site of an early medieval chapel, Keeill Abban, which had long fallen into ruin. St Luke's remains in use and has its own cemetery.  A cross rudely cut into a rough slab of granite (PRN 0722.30) taken from Keeill Abban has been built into the west gable of the present St Luke's Chapel.

Stained glass window depicting two crossed and unfurled flags in front of the Union flag. Above is the Three Legs of Man surrounded by a laurel wreath. Below the inscription is a Celtic designed emblem. Either side of the window has a brass plaque with a Roll of Honour, with 90 names listed alphabetically. The window, erected in 1922 as part of the war memorial approved for installation in 1921 is signed by Kathleen Shaw, a member of the Royal Hebridean Academy (RHA) in the lower left hand corner. First World War. Unveiled on 26 May 1923 by the Captain of the Parish, and dedicated by the Lord Bishop. Sponsored by Mrs G. Moore.

The parishes on the Isle of Man were established during the 12th century, usually on existing sites, and the discovery of both pagan and Christian burials, and of a medieval carved stone cross, confirms that the site has been in use for burial since at least the 10th century (see 0103.00 for the pagan graves and Manx Cross No 120 for the cross slab).   The current graveyard now extends across the main road but no evidence has been observed to suggest the original extent of the medieval burial ground. Lintel graves uncovered in the pathway immediately outside the present churchyard wall in 1948 suggest that the roadway now cuts into the old burial ground on the southeast side.

Several lintel graves were uncovered in 1948 during the excavation of a service trench in the footpath immediately outside of the present churchyard wall to the southeast of the church.   Three graves were recorded as being closely placed and on the same alignment and an unspecified number of additional graves were also observed.

The present parish church is of post-medieval date but is traditionally thought to contain remains of earlier structures dating back to the medieval period, though no evidence has been recorded to confirm this.   The parishes on the Isle of Man were established during the 12th century, usually on existing sites, and the discovery of both pagan and Christian burials, and of a medieval carved stone cross, confirms that the site has been in use since at least the 10th century.  Under such circumstances it would not be unreasonable to expect the presence of an early church on the site.

This terrace of cottages stands on the site of the original schoolroom in St Mark's which was replaced with a new school to the north of the church by 1846, at the instigation of the Reverend John Thomas Clark.  In 1846 the old school was replaced by a pair of cottages. Their rents were intended to help contribute to the upkeep of the church and new school. A third cottage was added in 1899, which created a row of three cottages.  The schoolroom cottages were reunited into a single dwelling in the late 20th century however. Three slate plaques fixed to pediments on the façade of the building read "TJ Clark Chaplain, I Bridson esqn Trustee"; "St. Mark's Cottages erected AD 1846" and "Dr TV Short, The Lord Bishop."

St Mark's Church was consecrated on 23 June 1772 to serve a community which was remote from Malew Parish Church. The church was renovated in 1827 as it was then in a poor condition.

There is a list of 6 names listed alphabetically, giving their place of residence. First World War. White and grey wall-mounted marble plaque. Unveiled 5 September 1920, in the presence of Lieutenant-Governor Fry, Mr John L. Goldie Taubman, H.K., and members of the Keys and Council. A dedication was made by Rev. S.B. Botwood, vicar of Malew. (IOM Examiner, 11 Sep 1920, p. 3).

A small building is shown here as a "Wesleyan Methodist Chapel" on the 1869 1:2500 scale Ordnance Survey map. The original chapel has been removed and replaced with a larger chapel which stands slightly further to the south, which remains in use and is known as the Ballagarey Methodist Chapel.

A small Wesleyan Methodist Chapel is shown here on the 1869 1:2500 scale Ordnance Survey map. A larger chapel was built slightly further to the south during the 20th century and the original chapel was removed.

The Parsonage associated with the church in St Mark's village, which was established in the late 18th century.

The school and School Master's House in St Mark's were established in 1843 by the Rev. JT Clark, and opened in 1846.  The school was closed in 1950.

A well is shown here on the 1869 1:2500 scale Ordnance Survey map.

Medieval lintel graves. The Manx Archaeological Survey (1918) states that a chapel and burial ground once stood at this location. The Survey notes that the site of the 'ruins and ground whereon the Old Chapel did stand' was sold by the Church in 1708 when the new chapel (St Matthew's Church at SC 38217531, itself demolished in 1898) was built. The Survey further notes that lintel graves were found close to the site of the cattle market towards the very end of the 19th century. These observations tend to place the site in the vicinity of the former Douglas Corporation electricity works, and the presence of lintel graves suggests burial activity dating to the medieval period.

Medieval burial ground. The Manx Archaeological Survey (1918) states that a chapel and burial ground once stood at this location. The Survey notes that the site of the 'ruins and ground whereon the Old Chapel did stand' was sold by the Church in 1708 when the new chapel (St Matthew's Church at SC 38217531, itself demolished in 1898) was built. It is possible that the cattle market remained as open space because of its earlier use as a graveyard. These observations tend to place the site in the vicinity of the former Douglas Corporation electricity works, and the presence of lintel graves suggests burial activity dating to the medieval period.

Prehistoric pottery. The Ordnance Survey 1:2500 First Edition mapping of 1867 marks the site of a chapel and burial ground, with the annotation 'Site of St Martin's Chapel & Burial Ground'. Investigation of the chapel by the Manx Archaeological Survey (1918) found pottery sherds in the vicinity of the west wall, prompting the Survey to suggest the presence of Bronze Age burial activity on the site. The surviving sherds indicated a vessel of 300mm diameter. It has since been suggested that many of the Survey's discoveries of pottery sheds may be no more than burnt clay or daub, but the indication of identifiable curvature in the material recovered here may imply more substantial evidence for prehistoric burial activity on this particular site.

49 names listed alphabetically in four columns thus: Rank, Name, Abode, Regiment. Heading and ending written in block Old English letters, the four columns are in Script letters. 24 additional names are listed. Key: + = Killed in Action (17); * = Brothers. Mounted on wall at rear of church. Black frame with glass front.

A number of lintel-graves, generally regarded as evidence of an early church site, have been reported from the area around the chapel, some in the angle between the south side of the nave and the annexe, and others elsewhere cut into the limestone bedrock. The full extent of the burial ground has never been defined.

In its original form - as the chapel for the growing community of Castletown - the building was rectangular and probably measured about 12 by 7m. The latest interpretation of the much altered building suggests that the arcade forming the south wall is the earliest surviving element, and is probably of later 14th century date. Masonry scars suggest that both gables are later rebuilds onto the south arcade, slighlty outside the line of their predecessors, and thus adding to the length of the building by 1 to 1.5m. The gables are now pieced by large rectangular openings which have substantially removed traces of their predecessors. It follows that the north wall is also later. The present doorway lies in the north wall and appears to be original. Two window openings, one each to the east and west of the doorway, are now blocked, and a chimney flue has been inserted just to the east of the door. As early as 1584 the building was functioning as 'the Scholehouse', for which these alterations, and the addition of the annexe to the south, were undertaken. It finally went out of use as the grammar school in 1930, and is now a museum.

The site of St Mary's Chapel and burial ground, also known as Keeill Moirrey.

The site of St Mary's chapel and burial ground (Keeill Moirrey). The keeill is thought to date to AD 500-1000. No feature identifiable as a chapel or burial ground enclosure remains today and the area is now covered by fern, gorse and grass. The ground slightly falls away to the south but the slopes appear to be natural.  The Ordnance Survey's 6 inch map of 1868 shows a banked enclosure here, apparently about 80 feet in diameter, but more recent 6 inch maps omit the feature and renders the name 'Keeill Woirrey', according with the present local pronunciation. The field name 'Keeill Wornish' occurs in a Deed of Conveyance of 1892 and is also recorded by Gill.  No foundations of the keeill or associated burials appear to have been recorded from the site. The site is heavily overgrown with gorse and it is almost impossible to define its borders. It appears, however, to contain no vestige of banks or walling. In the vicinity are several spoil heaps, doubtless connected with the nearby waterworks (Lower Ballacannell Reservoir).

The Great War / 1914-1918 / "Greet them again with tender / words and grave, / for, saving thee, themselves / they could not save." [list of 8 names] "Requiescant in Peace." / Holy Father, in thy mercy / Hear our anxious prayer / Keep our loved ones now far absent / 'Death thy car. / Our Roll of Honour. Followed by a list of 15 names. There is then a the title "R.I.P." followed by a list of 8 names.