Costa Diadema whose name (Italian for "tiara") says it all, offers the most complete, innovative and surprising experiences you could have on a cruise. Enchanting you with its many different styles, all coexisting in harmony. Surrounding you with the majestic and refined elegance of its different environments and atmospheres. Captivating you with a wide range of attractions for you to experience, from an endless selection of food, with flavours from around the world for you to enjoy, to the most spectacular Samsara Spa in the entire fleet, for maximum pleasure and well-being. The biggest. The most modern. The brightest jewel in the Costa fleet. Ready to sparkle before your eyes, whenever you want. The new flagship will include exclusive innovations in the areas of food, entertainment and technology.
| Year Built: | 2014 |
| Refurbished: | 2014 |
| Length: | 1,004 feet |
| Call Letters: | IBCX |
| Passenger Capacity: | 4,947 |
| Crew size: | 1,253 |
| Gross Tonnage: | 132,500 |
| Average Speed: | 20 knots |
| Passenger Decks: | 14 |
| Inside Rooms: | 701 |
| Outside Rooms: | 1,161 |
| Balcony Rooms: | 921 |
| Suite Rooms: | 75 |
