Example sentences of "have been [vb pp] [prep] roman time " in BNC.

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1 West of the village centre are vast quarries from which granite has been taken since Roman times .
2 It is certainly true that many of the by-roads in an area such as this may well have been used in Roman times though it is difficult to prove .
3 One of his earliest discoveries in this field was how to make Tyrian purple — an indigo derivative — from certain shellfish , a secret which had been lost since Roman times .
4 Projectile weapons had been known from Roman times , but much of the technology was redeveloped during the crusades .
5 Basing his calculations on the mass of ancient slag heaps dotting the Troodos ophiolite , George Constantinou estimates that 2000 thousand tonnes of copper had been mined by Roman times .
6 Under Dušan the Serbs had encouraged German miners ( known as Saxons ) from Transylvania to develop the mines of Kosovo , some of which had been worked in Roman times .
7 Other economic achievements of the late eighteenth century were the draining of the marshes in the old lake bed of the Ljubljansko Barje — work which had been started in Roman times and is still not completed — the introduction of maize and potatoes into the crop rotation , the expansion of viticulture and the development of the textile industry .
8 The main occupation of the village throughout the centuries was obviously agriculture , but three quarries have been worked since Roman times , and the oolitic limestone is found in many local churches , including Beverley minster .
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