The roundel structure uncovered in the outskirts of Prague, Czech Republic. It's thought to have been built around 7,000 years ago. In this combination image, views of the roundel, archaeologists ...

The rare 15th-century portrait Young Man Holding a Roundel by Italian painter Sandro Botticelli sold for a whopping $92.2 million, including fees, at Sotheby’s New York on Thursday morning.. The ...