| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | defensive fortifications | medieval Europe | Built around cities and castles to protect against invading armies. | 1 |
| 2 | defensive fortifications | medieval India | Included the construction of rock-cut fortifications and hill forts to defend against invading forces. | 1 |
| 3 | fortification | medieval Europe | Fortifications were crucial for defense and often included castles, walls, and moats. | 1 |
| 4 | fortification | medieval Europe | Fortifications were a crucial part of medieval European cities and castles, providing defense against enemy attacks and sieges. | 1 |