Margam Stones Museum is a small Victorian schoolhouse near Port Talbot, which now provides a home for one of the most important collections of Celtic stone crosses in Britain. All originally found within the locality of Margam, and mostly assembled as a collection in the 19th century, they provide enduring testimony to a Welsh Christian culture between the 6th and 16th centuries.
The striking Cross of Conbelin is the most celebrated example. From around 1000 AD, it is a huge disc cross with Celtic interlace and plaitwork patterns, figurative scenes including a hunting scene, and inscriptions telling us who made it and who erected it. There are 17 early Christian stones, plus 11 memorials and other stones from the post-Norman periods. The museum is run by Cadw, the Welsh historic sites agency, and is close to Margam Abbey Church and the ruins of the Abbey buildings.
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.