| Answer | Crossword Clue |
|---|---|
| HRE | Otto I's realm: abbr. |
| HRE | Otto I's realm (abbr.) |
| HRE | Otto I's realm: Abbr. |
| HRE | Otto I's realm, briefly |
| HRE | Otto the Great's realm: Abbr. |
| HRE | Realm of Otto I: Abbr. |
| HRE | Realm of Otto I (Abbr.) |
| HRE | Realm of Otto I (abbr.) |
| HRE | Otto I's empire: Abbr. |
| HRE | Otto I's domain: Abbr. |
| HRE | Louis I's realm: Abbr. |
| HRE | Otho I's realm: Abbr. |
| HRE | Maximilian I's realm: Abbr. |
