Dun Ardtreck is a D-shaped dun, or 'semi-broch', situated on a rocky knoll on the edge of a cliff overlooking the sea. It encloses an area of about 13 by 10 metres. It was constructed with a ruidmentary hollow-wall. The entrance is particularly well-preserved with door-checks characteristic of brochs. The entrance to a guard cell led off to the right behind the door-checks.
Dun Ardtreck was excavated by Euan W. MacKie in 1964-1965 as part of an exercise to establish the development of the broch. It had been built in two stages: a roughly level platform was constructed and on this was set the galleried wall. Charcoal from the platform was radiocarbon dated to 115 BC. The first phase of occupation seems to have been very short and it appears to have ended in violence and destruction. The second phase was dated from the pottery finds to the middle of the 2nd century AD. The finds from this period included iron tools, bronze ornaments and glass ring-heads as well as Roman Samian ware pottery sherds and a piece of a Roman bead.
References:The Roman Theatre of Mérida is a construction promoted by the consul Vipsanius Agrippa in the Roman city of Emerita Augusta, capital of Lusitania (current Mérida). It was constructed in the years 16 to 15 BCE. One of the most famous and visited landmarks in Spain, the Roman Theatre of Mérida is regarded as a Spanish cultural icon and was chosen as one of the 12 Treasures of Spain.
The theatre has undergone several renovations, notably at the end of the 1st century or early 2nd century CE (possibly during the reign of Emperor Trajan), when the current facade of the scaenae frons was erected, and another in the time of Constantine I (between 330 and 340), which introduced new decorative-architectural elements and a walkway around the monument. Following the theatre"s abandonment in Late Antiquity, it was slowly covered with earth, with only the upper tiers of seats (summa cavea) remaining visible.