A German court has upheld two convictions of a well-known neo-Nazi for Holocaust denial and sentenced her to 14 months in prison.

Ursula Haverbeck, 89, was sentenced Tuesday by a district appeals court in Detmold for repeatedly denying the Holocaust, which is a crime in Germany.

Haverbeck had appealed her 2016 conviction for writing to the Detmold mayor during the trial of an Auschwitz guard claiming the death camp was only a labor camp. In closing arguments at that trial she again denied the Holocaust, prompting another conviction.

Several courts have sentenced Haverbeck to prison sentences in the past, including a Berlin district court in October, but Haverbeck has remained free pending appeals.

The German news agency dpa reported Haverbeck's lawyers would again appeal this latest conviction.