Berlin - RB Leipzig's 4-1 thrashing of Hertha Berlin on Saturday ensured automatic qualification for next season's Champions League group stage after just one season in the Bundesliga.
Here are five things to know about RB Leipzig's stunning rise to European football's top club competition:
Fast climber
The club began life in 2009 when energy drink giants Red Bull bought the licence of minnows SSV Markranstaedt, who played near Leipzig.
The name was changed to RasenBallsport Leipzig, RB for short, because the name of a sponsor is not allowed under German Football League (DFL) rules.
In its first season, RB Leipzig won Germany's fifth division with a 22-point gap and two promotions in four seasons saw the club reach the second division.
In 2015-16 Leipzig earned a fourth promotion in seven seasons to nab a Bundesliga place.
No superstars
RB Leipzig began its first Bundesliga season with a 13-match unbeaten run with most of the squad having played in the second division or having arrived from sister club Red Bull Salzburg.
Red Bull's backing means the club could lavish huge sums on big-name players, but it won't. So Cristiano Ronaldo or Lionel Messi won't be rocking up any time soon.
"It would be absurd to think that it could work with them here," said sporting director Ralph Rangnick. "They are both too old and too expensive."
Instead the club has helped develop young talents into top-class players. Guinea midfielder Naby Keita, 22, signed from Red Bull Salzburg last July for €15 million, has attracted Liverpool's attention with his performances.
Playmaker Emil Forsberg, 25, who came from Malmo for just €3.7 million in January 2015, has provided 18 assists and eight goals this season.
Top-scorer Timo Werner, 21, now has 19 league goals with eight assists and made his Germany debut in March, but only signed for €10 million last June when ex-club Stuttgart was relegated.
Unwelcome newcomer
Initially, RB Leipzig was widely hated by fans of rival clubs for the commercialism it represented, especially after Borussia Dortmund CEO Hans-Joachim Watzke said they "only played football to sell cans."
A severed bull's head was thrown onto the pitch during a German Cup first-round defeat at Dynamo Dresden in August.
Cologne fans staged a sit-down protest which blocked the RB bus for an away game there in September.
Then Dortmund 'ultras' attacked away fans when Leipzig played there in February, leaving 10 RB supporters in hospital.
But the resentment shown by some towards Leipzig is no longer reflected by the majority of football supporters, according to a survey of 5,950 fans from Bundesliga clubs across Germany.
"It is acknowledged that refreshing football is being played in Leipzig and that their fans know how to behave," Gunter A. Pilz, an expert on German football fan culture, told SID, an AFP subsidiary.
Spring blip
RB Leipzig's first season in Germany's top tier has been helped by being able to focus exclusively on Bundesliga matches since a German Cup first-round exit last August.
Leipzig was level on 36 points with this season's champion Bayern Munich until the clubs met in December, when the visitor was thrashed 3-0 at the Allianz Arena.
The lack of experience was Leipzig's Achilles heel as the Bundesliga newcomer leaked two early goals, had Forsberg sent off and was 3-0 down at the break.
Leipzig wobbled in February and March, picking up just seven points in as many games including a 3-0 drubbing at home to relegation-threatened Hamburg, but are now unbeaten in their last seven games.
Big plans
Leipzig's Red Bull Arena, renovated for the 2006 World Cup, currently holds around 40,000 fans, but the club wants to rebuild to reach a 60,000 capacity, including hospitality lounges to cater for 400 VIPs.
Work is set to start in 2018 and the club has other big plans - to be German champion within the next eight years.
"I don't want to be 80 by the time RB win their first Bundesliga title," Red Bull's co-founder Dietrich Mateschitz, 72, said in 2015.