The oldest surviving parts of the St Mary's Church are the chancel and transept, dating to the 14th century. The nave, aisles and porch are 15th century, with the tower dating from about 1500. The tower has angle buttresses, uncommon in Pembrokeshire, and in 1842 was noted as having turrets (pinnacles) and a spire. The pinnacles were removed in the 19th century and the spire in the 20th century. A number of other alterations, externally and internally, were made during the 19th century, including to roofing and windows.
In the chancel are the tombs of Sir Nicholas de Carew (died 1311, who built the Edwardian castle) and Sir John and Elizabeth Carew. There are memorials to members of the Allen and other leading families. The west window is an 1857 Crimea memorial.
Old Mortuary Chapel is a medieval Grade I listed building in St Mary's churchyard. The building has two storeys under a slate roof, is oriented east–west, and is built from limestone rubble. It is accessed by external steps. It has a vaulted undercroft.
There is an exterior monument to John Relly, an early Calvinist Methodist leader who died in 1777.
The undercroft dates from the 14th or 15th century, and may have been an ossiary. In 1625 the building was referred to as a schoolhouse, and was used for this purpose until 1872. The building may have been used as a mortuary chapel, and is known by that name. After 1872, the building, which has a large blocked-up window, was used as a committee room, store and as a residence, housing paupers as late as about 1840. Its current use is as a parish meeting room and Sunday School.References:
Monte d"Accoddi is a Neolithic archaeological site in northern Sardinia, located in the territory of Sassari. The site consists of a massive raised stone platform thought to have been an altar. It was constructed by the Ozieri culture or earlier, with the oldest parts dated to around 4,000–3,650 BC.
The site was discovered in 1954 in a field owned by the Segni family. No chambers or entrances to the mound have been found, leading to the presumption it was an altar, a temple or a step pyramid. It may have also served an observational function, as its square plan is coordinated with the cardinal points of the compass.
The initial Ozieri structure was abandoned or destroyed around 3000 BC, with traces of fire found in the archeological evidence. Around 2800 BC the remains of the original structure were completely covered with a layered mixture of earth and stone, and large blocks of limestone were then applied to establish a second platform, truncated by a step pyramid (36 m × 29 m, about 10 m in height), accessible by means of a second ramp, 42 m long, built over the older one. This second temple resembles contemporary Mesopotamian ziggurats, and is attributed to the Abealzu-Filigosa culture.
Archeological excavations from the chalcolithic Abealzu-Filigosa layers indicate the Monte d"Accoddi was used for animal sacrifice, with the remains of sheep, cattle, and swine recovered in near equal proportions. It is among the earliest known sacrificial sites in Western Europe.
The site appears to have been abandoned again around 1800 BC, at the onset of the Nuragic age.
The monument was partially reconstructed during the 1980s. It is open to the public and accessible by the old route of SS131 highway, near the hamlet of Ottava. It is 14,9 km from Sassari and 45 km from Alghero. There is no public transportation to the site. The opening times vary throughout the year.