History behind the stunning diamond and pearl tiara in Queen Margrethe's latest portrait

Queen Margarethe of Denmark has donned a family heirloom in her official 80th birthday portrait, unveiled this week.

The head of the Danish Royal Family looks as regal as ever in the Pearl Poiré Tiara, which dates back to the 1800s.

⁣It's not the first time the Queen has worn the stunning diamond and pearl piece, sporting it in several official portraits over the years, including her first official portrait on ascending to Denmark's throne in 1972.

It featured in the royal's last official portrait, in 2012, and was also worn in official portraits by her mother and grandmother before her.

The tiara consists of 18 pear-shaped pearls hanging from diamond-studded arcades, and everything on the tiara is attached to a diamond-studded ring.

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It's part of the Pearl Poiré set, which also consists of a necklace, earrings and a large and a small brooch with diamonds.

The tiara came to Denmark when Princess Lovisa of Sweden married Crown Prince Frederick (who was later known as Frederick VIII).

Princess Lovisa, who went on to became Queen of Denmark and is Queen Margrethe's great-grandmother, inherited the tiara from her own grandmother, Princess Louise of the Netherlands (who died in 1871).

The current Danish monarch also is seen wearing a historic pearl brooch in her new portrait, this one also made for Princess Louise of the Netherlands in the 1800s.

This new 2020 portrait of Queen Margrethe, to mark her milestone birthday in April, was created by photographer Per Morten Abrahamsen over the European summer.

Her Majesty is also seen wearing the Order of the Elephant on the end of her sash as well as the order's breast star, along with the Grand Commander's cross of the Order of Dannebrog and Frederik IX's portrait with diamonds.

The portrait, which has been framed in a newly designed frame made of Danish oak and featuring the Royal Crown at the top, will be hung in government buildings including embassies and consulates, as well as on Danish ships.