| Author: | Petruccelli della Gattina, Ferdinando, 1816-1890 |
| Subject: | BX, Gregory VII, Pope, approximately 1015-1085, Church history -- 11th century, Papacy -- History -- To 1309 |
| Format: | Electronic text |
| Date issued: | 2013 |
| Language: | Italian |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Il re dei re, vol. 4 : Convoglio diretto nell'XI secolo [electronic resource] / Ferdinando Petruccelli della Gattina |