Euro 2020 gets underway on Friday as Turkey and Italy go head-to-head in Rome.
There will be 51 matches in tournament, which was postponed last year following the outbreak of the coronavirus pandemic, with the final set for July 11 at Wembley Stadium.
Even without the unprecedented conditions brought about by the pandemic, the Championships were set to be like no other before, spread across Europe to commemorate the tournament's 60th anniversary.
There were initially 12 cities scheduled to host the tournament, but it was subsequently reduced to 11, with Dublin relinquishing their responsibilities, while Bilbao's matches were moved to Sevilla.
The switches came following UEFA's demand that host cities would permit at least 25 per cent capacity crowds to their respective stadiums.
Dublin had been down to host three group games and a last-16 tie, the former of which will now be played in St Petersburg, while Wembley will take the responsibility of the latter.
With the Euros now just a matter of hours away, Sportsmail takes you through the host cities and their stadiums.
Amsterdam: Johan Cruyff Arena
The Johan Cruyff Arena will play host to four matches throughout this summer's European Championships, being three group games and a last-16 tie.
The stadium was originally named the Amsterdam Arena, but it was changed three years ago in 2018 to commemorate the passing of legendary Dutchman Johan Cruyff.
The arena, which holds a capacity of 54,990, was ahead of its time when it first opened in 1996, becoming the first stadium in Europe to be built with a sliding roof.
The Johan Cruff Arena is where Ajax play their football, with the prestigious Dutch side enjoying yet another fruitful season, as they won the Eredivisie for a record-extending 35th time earlier in May.
Matches at the Johan Cryff Arena:
But what's the situation with the fans in Amsterdam?
The Royal Netherlands Football Association (KNVB) have confirmed that 'at least 12,000 spectators' will be allowed into the stadium.
Furthermore, the event guide on the UEFA website indicated that an expected 16,000 fans will be in the stadium.
Importantly, there will be strict safety protocols to adhere to within the stadium, while those attending will have to record a negative test - taken on matchday - prior to entry.
Additionally, masks will have to be worn at all times, other than when spectators are sat at their seats.
As for any fans looking to potentially travel from Britain, the Netherlands is currently on the UK's 'amber list', meaning you would have to quarantine for 10 days, also taking a Covid test on or before day two, and on or after day eight.
Baku: Olympic Stadium
The Olympic Stadium in Baku, the capital of Azerbaijan, will also host three group games at the Euros, as well as a quarter-final.
Many British fans will remember the Olympic Stadium vividly - some fondly, others not - with Chelsea defeating Arsenal 4-1 in the 2019 Europa League final in Baku.
The stadium holds a capacity crowd of 68,700, and it is one of the newest at the Championships, having been built in 2015 for the European Games.
Matches at the Olympic Stadium:
But what's the situation with the fans in Baku?
Baku will allow the stadium to reach 50 per cent capacity this summer, with an expected 31,000 fans maximum at each game.
Azerbaijan have made ticket holders, who are citizens of Turkey, Switzerland or the United Kingdom, exempt from their prevalent travel restrictions.
This means that, providing they have previously recorded a negative Covid-19 test, traveling fans from those in Group A will be allowed into the country and stadium.
However, the Football Association of Wales have stressed that 'attending the matches will not be deemed as essential travel', in a warning against traveling.
That's because Azerbaijan is also on the amber list. Nevertheless, hundreds of Welsh fans have now started to travel to Baku.
But they'll need to show a negative PCR test before returning - and then quarantine at home for 10 days.
Bucharest: Arena Nationala
The Arena Nationala, situated in Bucharest, Romania, is no stranger to European competition, having hosted the 2012 Europa League final, where Atletico Madrid ran out 3-0 winners against Athletic Bilbao.
However, this will be the first time Romania has staged a senior men's major international tournament.
The stadium will host three Group C games, sharing the responsibility with Amserdam's Johan Cruyff Arena, alongside a last-16 clash.
It has a capacity of 55,600 and was built in 2011 on the site of the previous national stadium, which was demolished a couple of years prior.
It is home to both the Romania national team and club side Steaua Bucuresti.
Matches at the Arena National:
But what's the situation with the fans in Bucharest?
Similarly to Amsterdam, Bucharest has confirmed a minimum capacity of between 25 and 33 per cent, meaning at least 13,000 fans will be allowed into the stadium.
Again, there are a number of Covid protocols to follow. All ticket holders will be required to collect a wristband before entry, which can be obtained via four methods:
1) Providing evidence of a 'full' coronavirus vaccine, completed a minimum of 10 days prior.
2) Providing evidence of a negative PCR test, no longer than 72 hours before kick-off.
3) Proof of a previous coroanvirus infection - which must be between 15 and 90 days old.
4) Proof of a negative rapid antigen test, no older than 24 hours before kick-off.
Again, Romania is on the amber list for those in the UK, meaning a negative coronavirus test and a 10-day quarantine would be required on return.
Budapest: Puskas Arena
The Puskas Arena in Budapest, Hungary, has seen it's fair share of European action this season, hosting a number of Champions League and Europa League matches due to travel restrictions elsewhere.
It is the newest stadium we'll see at the Euros this summer, having been built in 2019, after its predecessor, the Nepastadion, was knocked down in 2016.
The stadium is home to the Hungarian national side, who are playing in Group F alongside Portugal, France and Germany.
Four matches will be played in the Puskas Arena, being three group stage games and an round of 16 clash.
Matches at the Puskas Arena:
But what's the situation with the fans in Budapest?
Remarkably, the Puskas Arena will be the one and only stadium to be committing to a 100 per cent capacity this summer, with an astonishing 67,889 fans set to spectate.
Again, however, all ticket holders will have to wear a coronavirus wristband to enter - and again, these can be obtained by a number of ways.
Citizens from Hungary will have to show a Hungarian Immunity Card or proof of immunity in the official EESZT app.
Those under 18 are exempt from wearing a wristband, but they must be accompanied by another Hungarian citizen - or an over 18 with a band.
For international fans, they will have to show proof of a full vaccination, or a negative PCR test, taken no longer than 72 hours before kick-off.
Those under 18 will have to wear a wristband, and they can only enter the stadium when with an adult.
Hungary is also on the UK amber list, meaning a negative coronavirus test and a 10-day quarantine would be required on return.
Copenhagen: Parken Stadium
If you know your football trivia, you'll remember that the Parken Stadium was host to both the 1994 European Cup Winners' Cup final, where Arsenal beat Parma, and the 2000 UEFA Cup final, where the Gunners lost on penalties to Galatasaray.
Where we've already outlined the newest stadium, we now have the smallest stadium, with just a capacity crowd of 38,065.
The stadium, first built in 1992, is home to both FC Copenhagen and the senior men's national side.
It will host three Group B matches, as well as a round of 16 match.
Matches at the Parken Stadium:
But what's the situation with the fans in Denmark?
Denmark also initially committed to at least 25 to 33 per cent capacity for their Parken Stadium, which would have been a minimum of 11,500 fans.
However, that number has now been able to go up to 15,900, in a major boost for the country.
However, there are again a number of protocols to follow.
To be allowed in, fans must either provide proof of a full vaccination, a certificate of a previous infection or a negative PCR or antigen test - no longer than 72 hours prior to entering the stadium.
Unsurprisingly, Denmark is also on the UK's amber list, meaning a negative coronavirus test and a 10-day quarantine would be required on return.
Glasgow: Hampden Park
The historic build in Glasgow will be the oldest used at this summer's Euros, having been constructed all the way back in 1903, though more recently renovated in 1999.
The stadium, which is home to both the Scottish national team and Queens Park, was actually the biggest in the world between 1908 and 1950, before it was surpassed by the Maracana in Rio.
Incredibly, Hampden Park held a crowd of 149,415 for Scotland vs England in 1937, when the hosts ran out 3-1 winners.
Hampden has seen some memorable matches in recent years, having played host to the 2007 UEFA Cup final and also used for football at the London Olympic Games.
However, this will be a particularly special occasion, with Scotland qualifying for a major tournament for the first time since 1998.
Hampden will host four matches throughout the Euros, being three Group D clashes, as well as a round of 16 affair.
Matches at Hampden Park:
But what's the situation with the fans in Glasgow?
As things stand, Scotland have confirmed the 51,866-capacity stadium will be at least 25 per cent full, meaning around 12,000 fans will be allowed in.
Unlike other stadiums, Hampden will not require a wristband or proof of a negative test to be allowed in.
However, there are strict entry time slots that must be followed.
London: Wembley Stadium
No venue will host more matches than Wembley at this summer's Euros, with England's national stadium to stage eight matches, being three Group D encounters, two round of 16 clashes, both semi-finals and the final.
The initial plan was that Wembley would host just the semi-finals and final, but Brussels lost their right to host matches in the tournament back in 2017, which meant the stadium took on another four matches, three group games and a last-16 tie.
After Dublin relinquished their hosting responsibilities, Wembley then received another last-16 match.
The stadium, the largest in the United Kingdom, opened in 2007 and has since welcomed over 21 million visitors.
Matches at Wembley:
But what's the situation with the fans in London?
Sportsmail understands that, regardless of the UK's Freedom Day on June 21, every game at Wembley will have a minimum of 22,500 fans permitted - as was promised to UEFA.
That's including the three group games, the two round of 16 matches, both semi-finals and the final itself.
And to add to that, The Telegraph have reported that the government are on the brink of approving 50 per cent capacity for the knockout stages, meaning England could potentially play Germany in front of 40,000 fans on June 29.
That's even if Freedom Day is delayed, with a potentially further increased capacity allowed if Step 4 does end up happening before the matches place.
Regardless, for those who do attend, there is once again some requirements they must fulfill.
Fully vaccinated fans will be allowed to use the NHS app to gain entry in the first time that vaccine passports have been used at a major UK sporting event - everyone else will have to take a test to enter to prove they are Covid-free.
Those fully vaccinated will have had to have had the second jab at least 14 days prior. And those taking the lateral flow test must have done so 48 hours before the gates to the stadium open - 3 hours before kick-off.
Munich: Allianz Arena
The Allianz Arena, home to Bayern Munich and the German national side, will host three Group F matches and a quarter-final at the Euros this summer.
The stadium has seen an abundance of high-profile fixtures in its time, hosting six matches at the 2006 World Cup won by Italy, while also hosting the memorable Champions League final between Chelsea and Bayern Munich, where the former won on penalties.
Two mammoth games in France vs Germany and Portugal vs Germany will be held at the Allianz Arena on June 15 and June 19 respectively.
Matches at the Allianz Arena:
But what's the situation with the fans in Munich?
There had been some doubts over the Allianz Arena hosting any matches this summer due to the coronavirus case levels in Germany, but the Bavarian and German governments have agreed to allow a minimum 14,500 fans into the stadium.
For all ticket holders above the age of six, they have one of two options.
They can provide a digital negative covid test - either rapid antigen or PCR - which must have been taken in Germany on the day of the match.
They can also pick up a covid wristband, which is available to those who are fully vaccinated or have recovered from covid.
Germany is also on the UK's amber list, meaning a negative coronavirus test and a 10-day quarantine would be required on return.
Rome: Stadio Olimpico
The Stadio Olympico will take centre stage on June 11 as it hosts the opening match of the European Championships, as Italy take on Turkey.
The build, which is shared between Seria A sides Roma and Lazio, was initially opened in 1937, since staging the finals of Euro 1968 and the 1990 World Cup, as well as four European Cup finals.
It will host three Group A matches between June 11 and June 20, before it stages one of the four quarter-finals on July 3.
Matches at the Stadio Olympico:
But what's the situation with the fans in Rome?
The stadium will operate at a 25 per cent capacity, with a total of 16,000 fans expected.
Ticket holders over the age of three have three options available to them.
They can provide a negative molecular or antigen test - which must have been taken within 48 hours of kick-off.
Alternatively, and exclusively to Italian residents, they can show proof of a covid vaccination, or they can display a certificate of a previous infection.
Italy is also on the UK's amber list, meaning a negative coronavirus test and a 10-day quarantine would be required on return.
They also require travellers to self-isolate for 10 days upon entry if they cannot display proof of a negative test - and they must inform the region they are vising ahead of time.
St Petersburg: Krestovsky Stadium
The Krestovsky Stadium, otherwise known as the Gazprom Arena, will host seven matches at this summer's European Championships.
It will stage three Group B matches, three three Group E matches and a quarter-final on July 2.
St Petersburg had initially been scheduled to host just four matches, but it took on the three Group E matches that were due to take place in Dublin.
The stadium, which is home to Zenit St Petersburg and the Russian national side, is another of the more modern builds we'll see at the Euros, having been built for the 2018 World Cup, where it hosted seven matches.
Matches at the Krestovsky Stadium:
But what's the situation with the fans in St Petersburg?
The 68,134-capacity build will permit 50 per cent of it's usual attendance, meaning there will be an estimated 30,500 fans allowed.
Those with tickets will need for a Fan ID document, which they must bring to the stadium to be allowed in.
However, those with tickets won't need a VISA to get into the country, and will be permitted simply with the Fan ID. They also won't need to display a negative covid test prior to stadium entry.
Russia is also on the UK's amber list, meaning a negative coronavirus test and a 10-day quarantine would be required on return.
Seville: La Cartuja
Seville will drafted in as a late replacement in April 2021 after Bilbao was unable to commit to permitting a 25 per cent capacity crowd.
It will stage three Group E games between June 14 and June 27, with a further round of 16 clash to come on June 27.
Many will recall it was the stadium that hosted an end-to-end UEFA Cup final between Celtic and Porto in 2003, where the latter emerged 3-2 winners.
The stadium, which often stages Spain's international matches, has a capacity of 60,000 and was built in 1999.
Matches at La Caruja:
But what's the situation with the fans in Seville?
With Bilbao out of the picture, Seville have guaranteed that there will be a minimum 30 per cent capacity inside their Estadio La Cartuja de Sevilla, as it's officially known, meaning there will be an expected 20,000 fans present.
Again, there are a number of protocols to follow. Firstly, Seville are also enforcing all ticket holders over the age of six to obtain and wear a covid wristband.
They can receive a band by getting a negative PCR test within 72 hours of kick-off, or by showing a negative rapid antigen result within 24 hours of kick-off.
Interestingly, those vaccinated are not exempt from getting a test.
And finally, Spain is also on the UK's amber list, meaning a negative coronavirus test and a 10-day quarantine would be required on return.