All 12 host cities for Euro 2020 will remain the same when the tournament takes place a year later than planned in 2021 due to the coronavirus crisis.
A meeting of the UEFA Executive Committee was held via videoconference on Wednesday.
After their deliberations, European football's governing body announced a host of decisions, including on how the Champions League and Europa League would be completed.
It was also confirmed the original 12 venues would host matches in the rescheduled Euros.
The meeting had been postponed in May after UEFA president Aleksander Ceferin said nine cities had affirmed their commitment to hosting, though there were issues with the remaining three.
But those concerns have been alleviated and, along with confirming the 12 venues, an updated match schedule was also approved.
The tournament will begin with a game between Italy and Turkey in Rome on June 11, 2021, with the final taking place exactly a month later in London.
Baku, Copenhagen, Munich, Budapest, Amsterdam, Dublin, Bucharest, St Petersburg, Glasgow and Bilbao are the other host cities.
"All existing tickets remain valid for the tournament in 2021," added a UEFA statement.
"Existing ticket buyers who nevertheless wish to return their ticket(s), will have a final opportunity to request a refund from June 18 to June 25.
"The Executive Committee expressed its appreciation to the host associations, cities and their authorities for their continuous support and commitment in organising the postponed Euro 2020."
Four spaces in the 24-team competition remain up for grabs as the play-offs are yet to take place.
The October and November international windows are to become triple-headers rather than double-headers, meaning those ties can be played on October 8 and November 12.
Meanwhile, a new season of Nations League action will begin on September 3, with group-stage matches taking place at regular intervals until November 18.
"UEFA took a bold decision when it decided to postpone Euro 2020," said Ceferin.
"But in doing so, we created the space which has allowed domestic club competitions across the continent to resume, where possible, and play to a conclusion.
"While the game has suffered huge difficulties as a result of the pandemic, those blows would have landed much harder if we had not shown leadership in those early days."