The band have been touring since last year

The group will play a newly-renovated 30,000-seat stadium in Coimbra - which will host matches in the Euro 2004 football championship.

Builders have added 17,000 seats to the 45-year-old stadium to boost capacity for the tournament.

City councillor Nuno Freitas said he was excited about the event.

"It will be the event of the year in the country," he told the Lusa news agency.

The Rolling Stones are currently on the UK leg of their world tour and have shown their concern for the environment by becoming the first group to stage a carbon-neutral tour in Britain.

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A scheme devised by the Future Forests group measures carbon dioxide emissions from a concert and then plants enough trees to counteract it.

Trees absorb carbon dioxide and produce oxygen.

The emission rate for touring is calculated by a specialist team of scientists and advisors in carbon management and takes into account factors such as venue size, fan travel and the distance between gigs.

The nine dates of the Stones' UK tour should bring in a total of 160,000 fans.

The team from the Edinburgh Centre for Carbon Management have calculated that planting and maintaining one tree for every 60 fans will make the Stones tour carbon neutral.

Nearly 3,000 trees will be planted on two forestry projects in Scotland on the Isle of Skye and in Inverness.