Anthony Guggenberger

• A general history of the Christian era
• A General History of the Christian Era; the Papacy and the Empire
• General History of the Christian Era - for Catholic Colleges and Reading Circles and for Self-Instruction, Volume 1
• General History of the Christian Era - for Catholic Colleges and Reading Circles and for Self-Instruction, Volume 2
• General History of the Christian Era - for Catholic Colleges and Reading Circles and for Self-Instruction, Volume 3
• Liudolf