The players gathered in a "TV puck pile" after the final signal and were celebrated big in the stands by the fellow fans.
There was an incredible atmosphere throughout the match.
Lyon's reserve goalkeeper Emma Holmgren came out and celebrated the title on the pitch while the trophy was engraved with Lyon's name.
The end was shattered by blows and players who hurt themselves and had cramps and remained for a very long time.
Ana-Maria Crnogorcevic had a great chance to reduce to 3-2 for Barcelona but did not get a hit on his fine position.
In the second half, Barca also had a rib shot from half the field.
But the real nerve never came.
Ada Hegerberg had a fantastic opportunity to put Lyon up another goal 97 minutes into the match, but he fired just over the crossbar.
With a quarter, the Swedish star Fridolina Rolfö, played left back, was replaced by Barcelona and got the end from the bench.
In the sixth minute, Amandine Henry won a tough melee, got up and banked 1-0 for Lyon with a dream hit in the far right cross.
- They are one of the most beautiful Champions League goals this season, says SVT's commentator Chris Härenstam.
"A career goal"
- That is a career goal that you can wake up in the middle of the night to think: "Did I really make that goal?", The expert Markus Johannesson describes the enormous hit.
In the middle of the second half, superstar Ada Hegerberg made it 2-0.
After a change, the ball was recorded to Hegerberg who nodded it in from close range.
The Barca defense was not included in the selection.
At 3-0, Barcelona could not make peace and Catarina Macario pushed the ball in via the post from close range.
By then, Barcelona's defensive game had collapsed.
Lyon had a bid of 4-0 but Barcelona grabbed a small straw by reducing to 3-1, which was the score at half time.
Alexia Putella's direct shot on volley.