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Entered service08/11/2014
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Tonnage132500
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Wheelchair Accessible Cabins30
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Number of Decks14
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Number of Elevators18
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Maximum Capacity4927
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Number of Crew1253
- View cruises
Costa Diadema
Life Onboard
Kids (4)
Swimming (7)
Restaurant (9)
Entertainment (26)
Bar/Lounge (10)
Kids (4)
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Kids
Club Allnatt
A fun space for teenagers to get together onboard, play interactive games, participate in activities, and be away from all the adults for a while! -
Kids
Squok Club
A colourful kids club with qualified staff hosting interesting events and stimulating activities for children ages 3 to 11 years; if you’re looking for somewhere to keep your little ones occupied, or a place where they can socialise with others their own age, Squok Club is ideal. -
Swimming
Kids
Squok Pool
Let the little ones have a splash around in the kid's pool, where they can make new friends and stay cool in hot weather. -
Entertainment
Activities
Kids
Teen's Zone
With interactive games and activities to get involved with, the Teen's Zone enables younger cruisers to get away from the adults and get to know others their own age.
Swimming (7)
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Swimming
Burmese Rose Pools
Splash around or do some lengths in the pool before warming up under the sun rays with a book. -
Swimming
Diana Pool
Cool off from the sun with a dip in the Diana pool, whether you fancy a quick splash around or to churn out a few lengths. -
Swimming
Featured
Jacuzzi
Rejuvenate and relax in the Jacuzzi after a long day, as you let the warm bubbling waters soothe tired muscles. -
Swimming
Kids
Squok Pool
Let the little ones have a splash around in the kid's pool, where they can make new friends and stay cool in hot weather. -
Swimming
Stella Del Sud Pool
Take a dip in the pool, or soak up the sun while relaxing on a sun lounger by the large Stella del Sud pool. -
Swimming
Thalassotherapy Pool
Located in the spa, the Thalassotherapy Pool is designed to soothe and heal guests with its warm salt water. -
Swimming
Waterpark Pool
Splash around in this onboard pool, having fun and making memories with loved ones and new friends.
Restaurant (9)
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Restaurant
Adularia Restaurant
Enjoy dinner at the main dining room, Adularia, which boasts a range of different food options. All tastes should be well-catered for at this gorgeous and welcoming restaurant. -
Restaurant
Club Diadema Restaurant
Try Club Diadema at least once during your cruise, perhaps for a special occasion. It's a fine dining restaurant serving evening meals only. -
Restaurant
Corona Blu Restaurant
At this casual buffet restaurant, guests can choose from a range of different food, such as salads, sandwiches, burgers and other meat dishes Open for breakfast, lunch, and dinner. -
Restaurant
Fiorentino Restaurant
Fiorentino restaurant, the main restaurant serving tasty breakfast, lunch, and dinner food. -
Restaurant
Gelateria Amarillo
With a wide selection of homemade ice creams to choose from, and conveniently located on the pool deck, this spot is the place to grab sweet treats throughout the day. -
Restaurant
La Piazza
Enjoy a taste of the Med at La Piazza, an Italian-inspired restaurant serving pizza and other delightful Italian dishes. -
Restaurant
Samsara Restaurant
Dine at Samsara, a refreshing restaurant serving health-conscious options for breakfast, lunch, and dinner. -
Restaurant
Tavola Teppanyaki
For an exciting and fun dining experience, try Tavola Teppanyaki, which serves authentic Japanese cuisine that's cooked before your eyes. -
Restaurant
The Pizzeria
The Pizzeria offers a great range of different pizzas - grab a slice to keep you going during the day.
Entertainment (26)
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Entertainment
Activities
4D Cinema
Enjoy the 4D Cinema, where you can feel as though you're part of the movie magic. All your sense will be tantalised during this fun and unique experience. -
Entertainment
Activities
Adult-only
Adult-Only Solarium
The peaceful solarium offers space for you to have some quiet time with your loved one, and relaxing in an adults-only environment. Enjoy a dip in the pool, or lounge on the deck chairs. -
Entertainment
Activities
Card Players Corner
If you’re looking for somewhere to sit down and play a card game or two – or maybe a board game – with friends and family, you’ll find plenty of tables and chairs to do just that right here. -
Entertainment
Activities
Featured
Chapel
This small chapel is used for a variety of events and activities onboard; you can also talk to your cruise consultant about arranging a service here. -
Entertainment
Activities
Country Rock Club
The perfect club for some good old-fashioned fun, rock and roll fans will love hanging out in this nightclub until the early morning, with some drinks. -
Entertainment
Activities
Enrichment
Desiree Room
Guests and staff are able to use this conference room for meetings, to renew vows, and see lectures and public speakers. -
Entertainment
Activities
Eliodoro Atrium
The heart of the ship serves as a centre of entertainment, and a fabulous meeting place thanks to the nearby bars and restaurants. -
Entertainment
Activities
Emerald Theatre
View amazing performances such as live musicals, and other, breath-taking acts at the Emerald Theatre. -
Entertainment
Activities
Fiorentino Atrium
The beautiful atrium is a gorgeous space where many cruisers meet to enjoy chatting, drinks, and pop-up entertainment. -
Entertainment
Activities
Galleria Shops
From luxury gifts for friends and family to treats for yourself and all the essentials, this unique shopping spot is home to a variety of retail outlets and plenty of places to browse for that something special. -
Entertainment
Activities
Giardino d'Inverno (Winter Garden)
Spend some quiet time enjoying the stunning, frosty display at the magical winter garden. -
Entertainment
Activities
Golden Jubilee Casino
Take the chance and try your luck at the Golden Jubilee casino, enjoy a slot machine, card games, or other table games. -
Entertainment
Activities
Outdoor Jogging Track
If you fancy stretching your legs while at sea, the Outdoor Jogging Track on the top deck is ideal; not only will you be able to get a few laps in, but you’ll also enjoy incredible ocean views while you do it! -
Entertainment
Activities
Perla Nera Library
Take time out of the bustling ship and head to the library to find a novel or reference book to get caught up in for an hour or more. -
Entertainment
Activities
Photo Area
Capture your cruise with the help of the onboard photographer, and head here to browse through your photos or buy your own camera equipment. -
Entertainment
Activities
Pietra di Luna Disco
Enjoy a fun night out at Pietra di Luna, where you can dance the night away in a lively atmosphere full of laughter and good music. -
Entertainment
Activities
Portobello Market
Find the perfect gift for friends and family at the Portobello Market, or why not treat yourself with a little something to take home as a reminder of your time away? -
Entertainment
Activities
Samsara Wellness Center
Spend the afternoon relaxing and letting the rest of the world pass you by for a few hours by unwinding at the wellness centre. -
Entertainment
Activities
Sauna
Unwind in the sauna, where the heat will cleanse your pores and soothe your muscles. -
Entertainment
Activities
Scuderia Costa
Feel the exhilaration of a formula 1 experience on this virtual Grand Prix simulator. -
Entertainment
Activities
Sports Court
The sports court can cater for activities such as basketball and tennis, so get fellow cruisers together for a game or two here if you fancy getting active. -
Entertainment
Activities
Star Laser
Battle it out with friends or family at Star Laser, where you can tackle a laser maze or engage in a laser fight. -
Entertainment
Activities
Kids
Teen's Zone
With interactive games and activities to get involved with, the Teen's Zone enables younger cruisers to get away from the adults and get to know others their own age. -
Entertainment
Activities
Maintenance
Tiara Room
This conference room is used for a range of things from lectures and events to private meetings. -
Entertainment
Activities
Turkish Bath
The Turkish bath is a traditional treatment which will leave you feeling clean and refreshed. Be sure to try it while onboard. -
Entertainment
Activities
Featured
Venus Beauty Salon
Take time out to relax and treat yourself to a pamper session, with a range of different treatments to choose from, why not try something new at the Venus Beauty Salon.
Bar/Lounge (10)
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Bar/Lounge
Bollicine Bar
Enjoy an evening of entertainment with a few cocktails or a glass of wine at the luxurious Bollicine cocktail bar. -
Bar/Lounge
Cigar Lounge
For those who smoke, enjoy conversation in a relaxing atmosphere at the cigar lounge. -
Bar/Lounge
Dresden Green Beer Garden
Enjoy a crisp beer and absorb some German culture at this beer garden style venue. -
Bar/Lounge
Eliodoro Bar
The Eliodoro bar is the perfect place to get a drink before dinner and socialise with other guests. -
Bar/Lounge
Gran Duca di Toscana Wine Bar
Wine drinkers will love the chance to taste a variety of new bottles at this gorgeous and atmospheric wine bar, where knowledgable waiters can make great recommendations and talk you through different wine types. -
Bar/Lounge
Orlov Grand Bar
Enjoy the lively Orlov Bar, which hosts exciting performances including live music and comedy acts. -
Bar/Lounge
Principe Nero Piano Bar
Sit back and take in the music and entertainment at Principe Nero Piano Bar, where you can also enjoy a range of delicious drinks and good conversation with fellow cruisers. -
Bar/Lounge
Stella del Sud Bar
Sip a cocktail at the al fresco Stella del Sud Bar, where you can chat with new friends while enjoying the sun. -
Bar/Lounge
Teodora Bar
This bubbly bar has a comfortable lounge area for guests to relax in while enjoying a drink. -
Bar/Lounge
Teodora Lounge
Spend an evening getting to know fellow cruisers at this stylish and vibrant bar area.
Customer reviews for Costa Diadema
4.7Out of 5
Cabin 5
Service 5
Excursions 4
Dining 5
Activities 5
Value for money 5
Entertainment 5
No Irish review yet. No Irish review yet. 24 reviews are available in different languages View all reviews
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