- Author: Harald Zimmermann
- Language: German
- Year: 2013
- Author: Harald Zimmermann
- Language: German
- Year: 2011
- Author: Wolfgang Klein, Harald Zimmermann
- Language: German
- Year: 1971
A középkori pápaság
mobi
- Author: Harald Zimmermann
- Language: Hungarian
- Year: 2002
- Author: Harald Zimmermann
- Language: Hungarian
- Year: 2002
- Author: Harald Zimmermann
- Language: German
- Year: 2011