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These magnificent architectural finds which reveal much about the heritage of mid Wales have been declared to be treasure.

All found in Powys , the wealth of precious goods include a Roman gold ring, a medieval brooch and a collection of Tudor-era coins.

A number of museums, including National Museum Wales, have said they are interested in acquiring the items, which were found between 2013 and March this year.

Perhaps the most spectacular item was the Roman gold ring, which is described as being typical of the third century AD.

(Image: Amgueddfa Cymru – National Museum Wales)

Unearthed near Newtown last October by Nigel Williams, it features a dark blue intaglio, or carved gemstone, which includes an image of a figure thought to be the Roman god Mercury.

National Museum Wales say they want to acquire the item.

Also found last October, by metal detectorist Michael Francis on land around the villages of Cwmdu and Bwlch, near Crickhowell , was a silver post-medieval seal matrix.

(Image: Amgueddfa Cymru – National Museum Wales)

It is of a form typical of the 15th and 16th centuries and is engraved with a pierced, radiating heart and clasped hands and flowers.

In March this year, meanwhile, Paul Williams of Bargoed found this 13th or 14th-century medieval brooch in the nearby Cwm Grwyne.

(Image: Amgueddfa Cymru – National Museum Wales)

There was also a gold ring, featuring characteristics of the 17th century, which was found by Alun Crichton in Llangynllo, near Knighton, in 2014; and a fragment of silver gilt finger ring probably dating to the 15th century, found in Old Radnor by Ian Cole in 2013.

The coins, including a 1530s Henry VIII groat, and three Elizabeth I coins – a 1570s threepence, a 1583 shilling and a 1595 sixpence – were found by Martyn Bowen in Penybont, near Llandrindod Wells, in December 2014.

The Powys finds are the latest unearthed gems in Wales to have been declared treasure. Last week Wales Online reported the finding of a variety of bronze items, including flat axes, found in Coity, Bridgend , and in Llanharan, Rhondda Cynon Taff .

To be classed as treasure archaeological finds must meet a series of legal criteria. All were officially declared treasure by a coroner following an inquest.