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We all have our different places for keeping things safe, whether it's a school locker or the back of a bedroom drawer.

But imagine if something you had safely hidden away was actually the key to solving an ancient mystery?

That's exactly what's happened to a historian who has solved the missing piece of a puzzle from a fragment of writing that was first discovered 15 years ago.

After translating the hieroglyphics on this fragment, Egyptologist Frédéric Payraudeau believes he has found the sarcophagus of one of Egypt's most famous ancient pharaohs - Ramesses II!

According to the Egypt Museum, Ramesses II was once Egypt’s most powerful king.

He reigned for six decades, lived to be over 90 years old and is said to have had more than 100 children!

Ramesses II was originally buried in a tomb in the Valley of the Kings.

This is an area where resting places were carved out rocks for important people like the pharaohs, their family, scribes, doctors and priests.

The large granite fragment was found in 2009, in Abydos - one of ancient Egypt's oldest cities.

Its text and decorations showed that the sarcophagus had been used twice to carry coffins.

The second time it was used by a high priest called Menkheperrê at around 1000 BC, according to France's National Center for Scientific Research.

Its first owner remained a mystery, but they were believed to be an important person of the Egyptian New Kingdom. This is the period in ancient Egyptian history between 16th and 11th Century BC.

By studying a certain engraving, Egyptologist Frédéric Payraudeau says he believed it had contained the coffin of Ramesses II.

The teacher-researcher from Sorbonne University in France has published his findings in French journal Revue d’Égyptologie.

A sarcophagus is a large type of coffin, usually made of stone, that is often decorated with images and words.

Sometimes another coffin made of a different material like wood is placed inside the larger stone sarcophagus.

They were commonly used for important people in ancient Greece, Rome and Egypt.