Cities in East Bulgaria are classified depending on importance or secrecy (like the Soviets).
| Type | Description | Example |
|---|---|---|
| A | secret military cities/closed cities | Atomniksgrad |
| B | scientific/nuclear cities semi-closed) | Kosmograd 2 |
| C | Open cities (to citizens) | Novi Varna |
| D | Open (also to tourists) | Varna |
List of known restricted citties[]
- Zelyazograd
- Atomniksgrad (contaminated)
- Karnobat-1 (secret military installations)
- Kosmograd (destroyed)
- Kosmograd 2 (space research city)
- Bocşa