Home / Royal Caribbean / Harmony of the Seas Wikimedia Commons About the ship Oasis-class cruise ship built in 2016 Description from Wikipedia, CC BY-SA. Identity: Q20489530 · IMO 9682875 · Built 2016 Operator Royal Caribbean International Passengers 6,687 Gross tonnage 226,963 Year built 2016 Royal Caribbean Harmony of the Seas 3.4 from 6 ratings 11 sailed · 0 bucket list .5 1 1.5 2 2 2.5 1 3 1 3.5 1 4 4.5 1 5 3.4 6 ratings