The massive section was lowered into the water in a process stretched over two days to reduce the number of workers present for COVID-19 safety precautions.
To Monfalcone for assembly
It will now be transported by sea to Monfalcone, where it will be assembled with the rest of the ship.
The launch had been scheduled for April but was delayed due to Italy's COVID-19 lockdown.
Sixth and final Royal-class ship
Discovery Princess is the sixth and final Royal-class ship. Delivery is planned in 2021.
It follows Enchanted Princess, which recently completed sea trials off the coast of Italy. Delivery had been planned in June but that was set back by the pandemic.