Twrcelyn Rural District

St Mary's Church is a medieval church in the town of Llannerch-y-medd, Anglesey, Wales. St Mary's Church is dedicated to Saint Mary. The east doorway in the tower and other parts of the tower probably date to the 12th century. It was extensively rebuilt in 1850 by the architect Henry Kennedy of Bangor. It was designated a Grade II-listed building on 5 December 1970.

Llannerch-y-medd, is a small village, community and post town on the Isle of Anglesey in Wales. The Royal Mail postcode is LL71, and it has a population of 1,360, of whom more than 70% is Welsh speaking. The village is situated near the centre of Anglesey close to the large water supply reservoir, Llyn Alaw, and is believed to have an ancient foundation. Llannerch means "a woodland clearing". The word medd in the name is Welsh for mead, which is made from honey, and the name may be related to the production of honey for mead. The disused Anglesey Central Railway runs through the village. Its station, opened in 1866, was closed in 1964 as part of the Beeching Axe, and its goods yard is now a car park. There is now a cafe and tea rooms housed in a modern extension of the old buildings. Just to the northeast of the village is the hill called Pen y Foel which is 123m above sea level; between 1951 and 1956 this was the site of a VHF Fixer station, part of the RAF Western Sector, and was one of a number similar fixed sites managed by RAF Longley Lane near Preston in Lancashire. The site contained an octagonal wooden hut with a hand-steerable radio mast with two radio receivers of type R1392D, transmitter and telephone line. This hut was protected by a close surrounding octagonal brick wall to provide some bomb blast protection which still exists. The station was used to allow each sector to locate RAF or allied aircraft and to help pilots find airfields in low cloud weather conditions. Also on the hill was a rectangular brick hut (now unroofed) also built by the RAF; this was a simple two-room hut with a rainwater collection tank. The site had three RAF wireless personnel (two were normally on duty) who were billeted with a landlady in Llannerch-y-Medd and attached to nearby RAF Valley. The site closed in around 1956 as the technology was replaced by improved systems. The hill Pen y Foel is also the basis for the name of the local Male Voice Choir Cor Meibion Y Foel which is a member of the National Association of Choirs. It has 43 members and rehearses in the village at Capel Ifan. Over the past decade the Choir has supported local Eisteddfodau, competed in the Anglesey Eisteddfod, raised money for numerous charities and has entertained audiences in concerts, weddings and other functions throughout North Wales. A claim that Mary, the mother of Jesus, is buried in the village forms the subject of Graham Phillips's The Marian Conspiracy. Mary's traditional burial place is near Ephesus, in present-day Turkey.

Llanerchymedd railway station was situated on the Anglesey Central Railway line from Gaerwen to Amlwch. There was a single platform with a small station building located on the Up (east) side of the track. Three sidings and two small goods sheds made a small goods yard, which was up on the Up side.All stations on the Anglesey Central line closed to passengers in 1964 (the sidings and all buildings but the station building itself were removed) as part of the Beeching Axe although freight works continued until 1993. The station building is owned by Isle of Anglesey County Council and reopened as a heritage centre, museum and community café in 2010. There is also the possibility of re-opening at least part of the branch to passengers.

Bryn Hafod is an area in the community of Llannerch-y-medd, Anglesey, Wales, which is 137.8 miles (221.8 km) from Cardiff and 219 miles (352.4 km) from London. Bryn Hafod is represented in the Senedd by Rhun ap Iorwerth (Plaid Cymru) and is part of the Ynys Môn constituency in the House of Commons.The renowned artist Keith Andrew has an art gallery at the village.

St Ceidio's Church, Rhodogeidio is a rural 19th-century church near Llannerch-y-medd, in Anglesey, north Wales. It was built using materials from the 14th-century church that previously stood on the site, which has been used for Christian worship since some time in the 7th century. The present building, which contains an east window dating from the 14th century and a 15th-century font, is no longer used for services, but has been looked after by local people. It is a Grade II listed building, a national designation given to "buildings of special interest, which warrant every effort being made to preserve them", in particular because it is "unusual in being built closely to the form and detail of its Medieval predecessor." Two 19th-century writers thought that the church was in a "dreary spot", but a 2006 guide to Anglesey churches describes it as being in a pleasant location with good views.

Llwydiarth-Esgob is an area in the community of Rhosybol, Ynys Môn, Wales, which is 137.3 miles (220.9 km) from Cardiff and 218.1 miles (350.9 km) from London. In the 18th century the poet Hugh Hughes lived on his estate here.

Coedana is a hamlet in Anglesey, in north-west Wales., in the community of Llanerchymedd.

Tryfil is a hamlet in the community of Bodffordd, Anglesey, Wales, which is 135.9 miles (218.7 km) from Cardiff and 218.3 miles (351.3 km) from London.

Bachau (Welsh pronunciation) is a small rural hamlet of about a dozen dwellings in Anglesey, north Wales, which is 137 miles (220.5 km) from Cardiff and 218.1 miles (351 km) from London. Bachau is represented in the Senedd by Rhun ap Iorwerth (Plaid Cymru). In the House of Commons it is part of the Ynys Môn constituency. It lies in the community of Llanerchymedd.

Gwredog is a village in the community of Llannerch-y-medd, Anglesey, Wales, which is 139 miles (224 km) from Cardiff and 220 miles (350 km) from London.

Meinir is a hamlet in the community of Llannerch-y-medd, Anglesey, Wales, which is 138.5 miles (222.9 km) from Cardiff and 220.2 miles (354.3 km) from London. The name "Meinir" in the Welsh language means 'girl'.

St Mary's Church, Rhodogeidio is a small medieval church, dating from the 15th century, near Llannerch-y-medd, in Anglesey, north Wales. It served as a chapel of ease to another church in the area, St Ceidio's. Some restoration work was carried out in the 19th century, but St Mary's has since fallen into disuse and is now largely in ruins. It is a Grade II listed building, a national designation given to "buildings of special interest, which warrant every effort being made to preserve them", in particular because it is "a late Medieval church of exceptionally simple character", and is virtually unaltered despite its poor condition. One writer has said that St Mary's "has the distinction of probably being the most isolated church in Anglesey".