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:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.