STOCKHOLM (October 17, 2013)--Archaeologists in Sweden have unearthed the remains of unusually large wooden monuments near a burial ground that predates the Viking age.
As workers dug for a new railway line, they found traces of two rows of wooden pillars in Old Uppsala, an ancient pagan religious center.
One stretched about 1,000 yards and the other was half as long.
Archaeologist Lena Beronius-Jorpeland said Thursday the colonnades were likely built in the 5th century, but their purpose is unclear.
She called it Sweden's largest and most intricately planned Iron Age construction.
She said the pillars are believed to have been at least 23 feet high.
They were placed in neat rows 20 feet apart.
Bones found in some postholes indicate that animals had been sacrificed there.