Click below to view a deck plan
Costa Diadema Stateroom Key
| Category |
Cabin Name |
| B1 | Balcony |
| B2 | Balcony |
| B3 | Balcony |
| B4 | Balcony |
| BA | Balcony |
| BA1 | Balcony |
| BA2 | Balcony |
| BC | Balcony |
| BP | Balcony |
| CI | Inside |
| E1 | Oceanview |
| E2 | Oceanview |
| EC | Oceanview |
| EP | Oceanview |
| ET | Oceanview |
| ET1 | Oceanview |
| GS | Suite |
| I1 | Inside |
| I2 | Inside |
| I3 | Inside |
| I4 | Inside |
| IC | Inside |
| IN | Inside |
| IN1 | Inside |
| IN2 | Inside |
| IP | Inside |
| MS | Suite |
| S | Suite |
Excelsior Deck
Sara Deck
Centenary Deck
Perla Di Venere Deck
El Dorodo Deck
Braganza Deck
Conde
Star of India Deck
Bizantino Deck
Hortensia Deck
Timur Deck
Stella D'Africa Deck
Millennium Star Deck
La Fenice Deck
