Arminia Bielefeld will return to the Bundesliga next season after an 11-year exile, with their promotion sealed thanks to results elsewhere in the second tier on Tuesday.
The 2. Bundesliga leaders were on the brink of securing their place in the top flight after thrashing Dynamo Dresden 4-0 the previous day.
And when second-placed Hamburg were held 1-1 by Osnabruck, leaving them seven points off the pace with two games to play, Uwe Neuhaus' side were able to celebrate.
Arminia's most recent spell in the Bundesliga ended with relegation in 2009, later twice suffering demotion to the 3. Liga before bouncing back.