He then began construction of the largest inhabited building in the world – the Venetian Macao. To ensure the structure was stable, 13,500 steel piles were driven into the bedrock below. At peak times, 15,000 people were working on the construction site. Adelson set a three-year time limit for construction. This meant building needed to take place at a rapid pace, but the building was finished on time. The hotel officially opened at 7:18 p.m. on August 28, 2007 -a time that was believed to have good feng shui.