A gold aureus of Roman Emperor Nerva reflects the delicate balance of power between the military and the ruling class in ancient Rome.

In February 2017, two brothers-in-law discovered buried treasure in a field north of Lincoln, the county city of Lincolnshire, England.

France marks the 25th anniversary of the pink ribbon as a symbol of breast cancer awareness with a circulating commemorative €2 coin.

A pair of modern Russian mint errors highlight Sincona Ag’s Oct. 23 auction in Zurich.

Latvia continues its annual series of gold coins depicting classic brooches with the horseshoe fibula in 2017.

A Canadian collector-dealer and an American hobby organization are commemorating the centennial of the Balfour Declaration with different numismatic items.

The final penguin coin in the Falkland Islands’ four-coin 50-penny series honors the Magellanic penguin.

A famous Disney character is celebrating the Year of the Dog on 2018 coins — and it’s not Goofy or Pluto.

A pair of new Proof silver coins from the Royal Canadian Mint are a reminder of the simple joys of a beach vacation.

From the Golden Gate Collection, this well-traveled, worn and relatively common gold aureus of Nero results from his monetary reform of circa 63 to 64.

The coin is part of a long series of commemorative pieces marking events between 1825 and 1856.

A 2017 1-ounce silver coin from Niue celebrates the Royal Australian Air Force’s CAC Boomerang plane, which debuted 75 years ago during World War II.

When this coin was struck in 149 to 152, the younger Faustina had just been named empress by the Senate to honor her father.

This $67,000+ gold aureus led a group of 40 coins that covers a century-long span during the peak of the Roman Imperial period from A.D. 60 to 160.

The majestic and colorful monarch butterfly graces a new 3-ounce silver $50 coin from Canada.

To mark the 20th anniversary of her death, the Pobjoy Mint has issued a suite of coins celebrating Diana, Princess of Wales.

A circa 1700 silver medal tells the story of Tobias from the Catholic and Orthodox Bible.

The Patagonian toothfish (Chilean sea bass) appears on a Falkland Islands 2017 1-crown titanium coin, shown, and a copper-nickel version, both from Pobjoy Mint.

The Royal Canadian Mint is issuing a circulating commemorative dollar coin in 2017 to celebrate the centennial of the Toronto Maple Leafs hockey team.

In 2014 Rhode Island metal detectorist James Bailey located a small silver coin from what is now Yemen. The coin could be related to pirates.

A unique and previously unknown type of antoninianus coin of emperor Postumus highlights Paul-Franics Jacquier’s Sept. 15 auction.