Royal Caribbean confirmed on 25 October 2012 that they were engaged in negotiations to build the third "Oasis"-class ship, which would become "Harmony of the Seas". The ship was officially ordered from STX France on 27 December 2012, after failing to come to an agreement with the Government of Finland for additional financial support to build the ship at the STX Finland shipyard that built the first two ships. Steel cutting began on 23 September 2013, and the ship was delivered in May 2016. The ship is larger than the preceding "Oasis"-class ships at an estimated 227,700 GT, in length, and in maximum width, representing an increase of 2,418 GT and length. The ship has 2,744 passenger staterooms with a capacity of 6,360 passengers (5,488 double occupancy), an increase of 64 passengers over the previous ships in the class, as well as 1,197 crew cabins capable of berthing 2,100 crew. The ship features an expanded adults-only solarium area and three water slides, a first for Royal Caribbean. It cost about €1 billion (US$1.35 billion) and entered service in May 2016.