Experts say the six highlighted points indicate this may be a daVinci original (Daily Mail)

Fiona McLaren, 59, had kept an old painting in her Scottish farmhouse for decades. She reportedly didn't think much of the painting, which had been given to her as a gift by her father. But after she finally decided to have the painting appraised, some experts are speculating that it may in fact be a 500-year-old painting by Leonardo da Vinci and potentially worth more than $150 million.

"I showed it to him [auctioneer Harry Robertson] and he was staggered, speechless save for a sigh of exclamation," said Ms. McLaren, according to The People.

The Daily Mail says the painting may be of Mary Magdalene holding a young child. The painting is now undergoing further analysis by experts at the Cambridge University and the Hamilton Kerr Institute, who will attempt to uncover its exact age and origins.

Even if the painting is not a da Vinci original, it is believed to at least be from the da Vinci school, created by one of the master's pupils during the 16th century.

A papal bull was found attached to the back of the painting and is believed to have originated from the era of Pope Paul V, head of the Catholic Church in the early 17th century. McLaren says the word "Magdalene," is visible on the faded paper.

McLaren says she hopes the painting is sold to a museum, and she plans to donate a percentage of the painting's sale value after it is auctioned.