Millenium Tower / Rotterdam Marriott Hotel (Rotterdam)

 skyscraper, mixed-used building

Millennium Tower is a 35-storey, 130.8 m (429 ft) skyscraper in Rotterdam, Netherlands design by WZMH Architects and AGS Architecten. It was completed in 2000. The tower was built on Weena in front of the Central station. It is currently mixed use, containing hotel, apartments, offices and health studio.
Houses the Rotterdam Marriott Hotel, formerly the Manhattan Hotel, before that The Westin Rotterdam
www.marriott.com/hotels/travel/rtmmn-rotterdam-marriott...

The tower was originally designed to be built with hollow-core slabs, but close to building start the design was changed to incorporate the BubbleDeck system. This was the first time this new method was in use in the Netherlands, and also the first major project worldwide to incorporate this technique.
In spite of the late design change, the project was finished before time, due to a reduction in the erection cycles from 10 to 4 days per level, and a reduction in crane lift by app 50 percent.
When finished, Millennium Tower was the second tallest building in the Netherlands.