Queen Elizabeth II is known for her love of racehorses, breeding dogs (she once broke royal protocol to honor her Corgis), and indulging daily in a slice of chocolate cake. But what some may not know about the queen is that shes a big stamp collector. In fact, she owns a seriously impressive stamp collection experts say is worth 100 million, according to The Telegraph. Keep reading to learn more about her stamp collection and who will likely inherit it upon her death.

As the royal familys website says, philately is the study of stamps. The Royal Philatelic Collection is the British royal familys name for the queens stamp collection which is made up of hundreds of boxes and albums filled with rare, valuable, and historic stamps. The albums are color-coded by monarch; red for King George V, blue for King George VI, and green for Queen Elizabeth.

King George V started collecting stamps in the late 1800s when hed still been the Duke of York, according to the Smithsonian National Postal Museum. When he took up the hobby, he enlisted the help of his uncle, Prince Alfred, Duke of Edinburgh, who had originally started the royal stamp collection in 1864.

Over time, King George V became very interested in the hobby. Whenever he visited London, the king reportedly spent up to three afternoons a week working on the collection, once remarking he wanted the best stamp collection not just one of the best.

After King George V, King George VI took up the hobby and grew the stamp collection even more. Then came Queen Elizabeth who made it what it is today.

The collection isnt housed at Buckingham Palace. Instead, its kept in vaults at St. James Palace. However, certain stamps within the collection have gone on display as part of museum exhibitions.

As The Sun reported, the queen is the fifth monarch to inherit the royal stamp collection. While we dont know for sure, if Queen Elizabeth were to keep with royal tradition, she would leave the Royal Philatelic Collection to her oldest son, Charles, Prince of Wales, who is first in the royal familys line of succession. However, we wont know who will inherit the stamp collection until the queens demise.

The queen is said to be partial to giving guests a look at her stamp collection when they stay at Buckingham Palace.

According to The Sun, royal expert Phil Dampier told Fabulous Digital the queens stamp collection is one of her pride and joys and she loves showing it to visitors.

The Queen loves showing her stamp collection to visitors, say heads of state who stay at Buckingham Palace, he said. It is one of her pride and joys, not only because she owns some of the worlds most valuable stamps, but also because she has built on a family treasure and feels she has done her father and previous monarchs who owned it proud.

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Who Will Inherit the Queen's 100 Million Stamp Collection When She Dies? - Showbiz Cheat Sheet