From reaching Level 2 of the expedition, we get Castle, which can be built on the water on our island.
Each castle level increases the population limit by 200 settlers.
The castle can be improved to the level 15.
| Level 1 | Level 2 |
200  |
400 |
 |
 |
| Level 3 | Level 4 |
| 600 |
800 |
 |
 |
| Level 5 | Level 6 |
| 1.000 |
1.200 |
 |
 |
| Level 7 | Level 8 |
| 1.400 |
1.600 |
 |
 |
| Level 9 | Level 10 |
| 1.800 |
2.000 |
 |
 |
| Level 11 | Level 12 |
| 2.200 |
2.400 |
 |
 |
| Level 13 | Level 14 |
| 2.600 |
2.800 |
 |
 |
| Level 15 | |
| 3.000 |
|
 |
|