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Archaeologists in Denmark have discovered a huge Viking hall thought to date between the 9th and 11th century.

Experts say it's the largest Viking structure to be found in more than 10 years.

The prestigious building is thought to have been built around the time of Danish King Harald Bluetooth's (in Danish, Harald Blåtand) rule.

The site in North Jutland has only been partially excavated so far and the team think there may be houses hidden nearby too.

The discovery is up to 40 metres long and around 10 metres wide - that's similar to the size as two tennis courts.

The roof of the massive building is thought to have been supported by around 12 oak posts.

Archaeologists think it was probably used as a place to hold 'political meetings and large Viking guilds'.

They also say it's likely the discovery belonged to the one of the more important and powerful families in North Jutland - the family of Runulv den RÃ¥dsnilde.

The reason they think this is because a rune stone with his name on was previously excavated nearby.

"It is difficult to prove that the found Viking hall belonged to the family of Runulv den RÃ¥dsnilde, but it is certainly a possibility," said excavation leader Thomas Rune Knudsen.

"This is the largest Viking Age find of this nature in more than ten years, and we have not seen anything like it before here in North Jutland, even though it has only been partially excavated." He added.

Bad weather has stopped the team there being able to continue excavating, but they hope to resume once the weather improves.