They were met by around 1,000 anti-Nazi demonstrators and 2,000 police, who were dispatched to Bad Nenndorf to secure the city.
That Bad Nenndorf has become the new place of choice to stage neo-Nazi events is linked to the Winckler Bad. The 1930s building in 1946, a year after the end of World War II, housed a British Secret Service-run prison for German Nazi leaders, some of whom were abused.
This has caused the neo-Nazis to organize what they called a "march of mourning" to protest "Allied post-war crimes," German news Web site Spiegel Online reports.
The neo-Nazi presence in Bad Nenndorf has enraged the local population, who staged their own event under the motto "Bad Nenndorf is colorful," with the goal to stop the neo-Nazis in their attempt to turn perpetrators into victims.
Yet it wasn't sure at all that the anti-Nazi event could take place.
Authorities initially banned an anti-Nazi demonstration and a regional court didn't green-light it until Friday evening -- albeit as a two-hour stationary gathering before the arrival of the neo-Nazis in the city, and not as a parallel protest march. Police feared that militant far-left activists would try to stage attacks on the neo-Nazis and that they, in turn, would also respond violently.
The anti-Nazi activists weren't happy.
"It's a shame that the neo-Nazis have more rights than we have," Juergen Uebel, one of the founders of the anti-Nazi event and the owner of a local pharmacy, told Spiegel Online.
Uebel is one of around 300 locals, including the city's mayor, who took part in a Saturday morning sermon jointly organized and held by Bad Nenndorf's Catholic, Lutheran and Jewish congregations.
The later anti-Nazi event drew an estimated 1,200 people -- slightly more than the neo-Nazi march, which was attended by far-right activists from all over Germany and the Netherlands.
Seventeen people, neo-Nazis as well as anti-Nazi activists, were detained that day, police said. A group of black-clad far-left activists repeatedly tried to break through the wall of policemen accompanying the neo-Nazis, injuring a small number of officers. Authorities have also started investigating an unidentified number of neo-Nazis for singing a song that contains racist slogans.
Most of the anti-Nazi activists remained peaceful in their protest, and they intend to keep up their opposition to the event: The neo-Nazis have said they plan to come back every year.