They overturned a 0-4 deficit from the first leg of the round of 16 against Paris Saint-Germain to win the second leg tie 6-1 and qualifying for the quarter-final. [A night no kid will ever forget: Enrique]
It was an unforgettable night for football fans across the world. No one could believe their eyes as they witnessed Barcelona scoring 3 goals in the last 9 minutes of the match to win the tie.
They were fighting against odds as no other team had ever come back from a 4-0 deficit.
As Barcelona script history, we look back at some of the greatest comebacks in the history of UEFA Champions League.
Here are the 5 greatest comebacks in UEFA Champions League:
Barcelona 6-1 PSG (2016/17)
FC Barcelona's epic comeback against PSG will go down the history books as the greatest comebacks ever in UCL history as no team has ever overturned a 0-4 deficit.
Deportivo 4-1 AC Milan (2003/04)
Prior to Barcelona's heroics, arguably the greatest comeback's baton was with another Spanish side Deportivo La Coruna who defeated AC Milan 4-1 in the second leg overturning a 3 goal deficit. Milan had won the first leg 4-1, but the Spanish side came back stronger and thrashed the Italian giants 4-0.
Liverpool 3-3 AC Milan (2004/05)
Popularly known as the 'Miracle of Istanbul', Engish giants Liverpool scripted history by overturning a 3 goals deficit fromthe first half to taking the match into extra time and penalty shootout and finally winning the title.
Manchester United 2-1 Bayern Munich (1999/00)
Even before Liverpool did the unthinkable at Istanbul, their arch-rivals Manchester United staged a huge comeback in the final of Champions League of 1999/00 season. Mario Basler's early strike had put Bayern in the front but Teddy Sheringham and Ole Gunnar Solskjær's 90th minute strikes gifted the Red Devils the trophy.
FC Barcelona 5-1 Chelsea (1999/00)
FC Barcelona once again features in the list of our greatest comebacks. They had made a comeback from 1-3 deficit in the first leg against Chelsea to win the second leg 5-1.
All images are taken from UEFA.com