Subject
- Intellectual life18
- Mesolithic period18
- Influence17
- Religious aspects17
- Travel17
- Antiquities, Roman15
- Prehistoric peoples15
- Reformation15
- Social life and customs15
- Neolithic period14
- Christian art and symbolism13
- Cities and towns12
- Civilization, Medieval12
- European cooperation12
- Historiography12
- Jews12
- Petroleum12
- Art, Medieval11
- Identification11
- In literature11