Yarmouth Castle is an artillery fort built by Henry VIII in 1547 to protect Yarmouth Harbour on the Isle of Wight from the threat of French attack. Just under 30 m across, the square castle was initially equipped with 15 artillery guns and a garrison of 20 men. It featured an Italianate 'arrow-head' bastion on its landward side; this was very different in style from the earlier circular bastions used in the Device Forts built by Henry and was the first of its kind to be constructed in England.
During the 16th and 17th centuries the castle continued to be maintained and modified; the seaward half of the castle was turned into a solid gun platform and additional accommodation was built for the fort's gunners. A bulwark was built on the east side of the castle and an additional gun battery was placed on the town's quay, just to the west. For most of the English Civil War of the 1640s it was held by Parliament; following the Restoration, it was refortified by Charles II in the 1670s.
The fortification remained in use through the 18th and 19th centuries, albeit with a smaller garrison and fewer guns, until in 1885 these were finally withdrawn. After a short period as a coast guard signalling post, the castle was brought back into military use during the First and Second World Wars. In the 21st century, the heritage organisation English Heritage operates the castle as a tourist attraction.
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.