Costa Cruises ordered the
Dream-class vessel in October 2012, making her the largest ship to be ordered and built for Costa. The ship cost
Carnival Corporation US$739 million to build. She was ordered and built to replace the , which sank earlier in the year.
Costa Diadema had her
keel laid on 10 December 2012 at
Fincantieri's shipyard in
Marghera, marking the beginning of her hull assembly. She was
launched on 15 November 2013, with an official ceremony performed by Franca Grasso, the ship's madrina at her launch. Her naming ceremony was held on 7 November 2014 at the
Port of Genoa, where she was officially
christened by Italian travel agent, Carolina Micelli. As of 2019, she rotated between the Mediterranean in the spring and summer months and the Persian Gulf in the fall and winter months. ==References==