Saga said she was playing in the water, because she "likes to play with rocks and stuff and skip them", and suddenly felt something with her hand and picked it up, thinking it was a stick. "Dad, I found a sword", she said.
Saga Vanecek, who lives with her family in Sweden, pulled the 33-inch sword from the bottom of the lake, held it up in the air and proudly declared, "Daddy, I found a sword!" The scabbard holding the sword is made of wood and leather and it is tentatively considered to be from the Iron Age - at least 1,000 or even 1,500 years old.
The arts and cultural museum said the sword - which measures about 83 centimeters long - is believed to date back to the 5th or 6th century AD.
Now plans are for the sword to make its way to museum.
"She picked up the object, lifted it high above her head, and shouted as if she was Pippi Longstocking", he said. "Did someone fall overboard, or through the ice during a winter trek?"
It is 85cm long and "exceptionally well preserved", the museum added.
According to The Local, the water level of Vidöstern lake was very low this year due to a drought, which might have contributed to why the young girl, Saga Vanecek, spotted the sword so easily.
The sword is made from wood and leather has been well-preserved, the museum said.
"Why it has come to be there, we don't know", he told the site.
"It's not every day that one steps on a sword in the lake!"
Andy Vanecek's home state is Minnesota, but the family moved to Sweden past year from Minneapolis because they wanted to be closer to his wife's relations, the report said. As for Saga, who moved to Sweden with her family in 2017, the Guardian notes some have dubbed her the country's "true queen" for her find. "At first we thought it could be graves situated nearby the lake, but we don't think that any more".