The sky itself is no limit for billionaire Jeff Bezos and fiancée Lauren Sánchez. They have traveled into space, and expectations are just about as high for their wedding in Venice.

Amazon founder Jeff Bezos and former journalist Lauren Sanchez are set to tie the knot in Italy this week, even as local frustrations mount over the multi-million dollar event. Here's what to know about the three-day wedding celebration,

The star-stunned event boasts a guestlist of some 200 celebrities and business elite, from Ivanka Trump to Usher.