Rhuddlan Castle was erected by Edward I in 1277, following the First Welsh War. The castle was completed prior to the rebellion of Llywelyn the Last in 1282. The remains of older Norman castle at Twthill, built in 1086, is just to the south of the current castle.
In 1294 the castle was attacked during the Welsh rising but was not taken. It was attacked again in the by forces of Owain Glyndŵr in 1400. This time the town was badly damaged but the castle held out. In the latter 15th and early 16th centuries the castle's condition deteriorated as its strategic and administrative importance waned.
Rhuddlan Castle was again garrisoned by Royalist troops during the English Civil War, and remained a stronghold of King Charles I of England until well after the Battle of Naseby, being taken by Parliamentary forces under Thomas Mytton after a siege in 1646. Two years later, Parliamentarians partially demolished the castle to prevent any further military use. By the time Pennant passed through in 1781, it was largely ruined.
Rhuddlan was planned as a concentric castle. It has a unique 'diamond' in layout as the gatehouses are positioned at the corners of the square baileys instead of along the sides like at Flint, Harlech or Beaumaris. Records of construction costs show that it was the major piece of building work being carried out by the English during the late 1270s.
The inner ward has defensive walls with twin-tower gatehouses. The outer ward is surrounded by a curtain wall that has small towers and turrets. The castle had a three-sided moat, with the River Clwyd protecting its fourth side. Within the inner ward there was a great hall, kitchens, private apartments and a chapel. The outer bailey had a granary, stables and a smithy.
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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.