Mike Frantz has joined Freiburg for an undisclosed fee to end a six-year association with Nuernberg.
Frantz, 27, joined Nuernberg in 2008 and went on to make 109 league appearances for the club, scoring eight goals.
The midfielder was entering the final year of his contract, but with the side suffering relegation to 2. Bundesliga last season, he has opted to remain in Germany's top flight.
"Freiburg is an association that has established itself in recent years in the Bundesliga. I hope that I can help the club and the team with my experience,'' Frantz told Freiburg's official website.
"The way football is played at Freiburg has always impressed me. It was always uncomfortable to play against Freiburg, so that makes it even more enjoyable that I can now play for them.''
Freiburg sporting director Jochen Saier added: "We had very good discussions with Mike Frantz, where it quickly became clear that he fits in very well with what we want to do. We believe that his quality, experience and versatility will help."
Nuernberg chairman Martin Bader thanked Frantz for his service to the club on their official website.
"We regret to see Mike leave us. He has always identified himself with the club over the years and was one of the longest-serving players at Nuernberg,'' he said.
"Freiburg offered him a long-term contract and so his decision is understandable. In return, Nuernberg have obtained a suitable financial resolution.''