Crystal Palace not only won their first trophy after winning the FA Cup final over the favored Manchester City - 1:0, because the London club also secured participation in the Europa League, but also, in traditional England, and even more importantly - the status of an elite club.
This allows it to have triangular flags on the corner lines, which is an unwritten rule for clubs that have won the oldest football competition.
Although there is no rulebook that prevents a club from displaying triangular flags on its field, there is an unwritten rule that no one does so. And they don't.
There is no exact information about when this tradition began, but it is assumed that Cardiff was the first to install them at their stadium instead of rectangular ones in 1927, and the Welsh club did this, after winning the FA Cup, simply to show their greatness in relation to their biggest rival, Swansea.
This decision became especially popular after the 1997 film "Twin Cities", and in England the tradition of triangular flags is perceived as a football law: only those who have won the FA Cup can use them. There is not a word about this in the FA rules - from a legal point of view, anyone can put up triangles, but an English club without a trophy of the oldest football competition will not do so.
All English clubs that have won the FA Cup use triangular flags at their stadiums, except Liverpool, which has won it eight times.
In the country, it is the same indicator of prestige as the gold Premier League emblem on the sleeve for the reigning champion.
Everyone wants to proudly show off their triangular flags, so AFC Wimbledon erected triangular flags even though they have never won the FA Cup, but with this gesture they want to prove that they are the true heirs of the "defunct" Wimbledon, which won the FA Cup in 1988.
And Liverpool!? They still use rectangular flags at Anfield, and the aversion to triangular ones is a specific feature of the most trophy-winning club on the Island.
Brendan Rodgers insisted in vain on using triangular formations, but in vain while Jurgen Klopp and Arne Slott did not even ask the question.
Which empire will Crystal Palace side with? Judging by the announcement before the 2016 final, which they lost to Manchester United on Wednesday, they could become the second club to abandon the unwritten law of triangular flags.
"Football has become too one-size-fits-all in many aspects, we want to be different from others," said Gareth Reid, Crystal Palace's groundsman, on the eve of their loss to Manchester United in the final.
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