The Apollo Pavilion, in Sunny Blunts, Peterlee, underwent six months of improvements to reinstate its original features and landscape the area around it.

Built in 1969 by Victor Pasmore, it was meant to symbolise post-war simplicity and has become a world-renowned piece of art.

But it also became a magnet for troublemakers, who used it as a drinking den and daubed it with graffiti.

The restoration project saw the staircase replaced, giving visitors access to the upper level of the structure, while lighting and two original murals were renewed.

To mark the upgrade yesterday, residents and guests were invited to see the improvements, with Mr Pasmore's son John unveiling a plaque.

John said: "I am delighted that the Apollo Pavilion has been restored to its original state, and once again reflects my father's vision.

"A lot of time and effort has gone into this project and I would like to thank all those who have worked hard to highlight his work at Sunny Blunts."

Councillor Eunice Huntington, Durham County Council's cabinet member for healthier communities, said: "The refurbishment of the pavilion provides a real boost to the regeneration of this part of Peterlee and will enhance its role as a tourist destination."

The restoration project was funded with £336,000 from the Heritage Lottery Fund and £65,000 from the former District of Easington Council.