Jeff Bezos and Lauren Sanchez are all prepared to host what many are calling “the wedding of the century” in the romantic heart of Venice, Italy. (Image: Instagram)

Why is their lavish three-day affair being dubbed the ‘wedding of the century’? (Image: Instagram)

$55 Million Celebration: The grand affair reportedly costs between $46.5 and $55.6 million. It also includes sizeable charity donations to Corila, an academic body dedicated to preserve Venice’s fragile lagoon ecosystem. (Image: Instagram)

Venice: The main party was held at the historic Arsenale, a 15th century fortified naval dockyard. Reportedly, the wedding might have been held at San Giorgio Maggiore’s basilica or Scuola Grande della Misericordia, an iconic Venetian landmark steeped in Renaissance grandeur. (Image: Instagram)

90 Private Jets, 30 Water Taxis: About 90 private jets touched down at Venice, Treviso, and Verona airports, while 30 water taxis zipped guests through the canals. Bezos also booked out Venice’s most opulent hotels including the Aman Venice, Gritti Palace, Belmond Cipriani, St. Regis, and Hotel Danieli. (Image: Instagram)

Star-Studded Guest List: Attendees include Oprah Winfrey, Leonardo DiCaprio, Kim Kardashian, Katy Perry, Ivanka Trump and more. (Image: Instagram)

Festivities: The celebrations kicked off with a Venetian-themed welcome dinner at the Scuola Grande, where guests arrived via a fleet of water taxis. The next morning, the guests boarded Bezos’ superyacht Koru for a cruise through the Venetian lagoon. (Image: Instagram)