Luxury wedding planners on what they expect from Jeff Bezos and Lauren Sánchez's Venice wedding

Jeff Bezos and Lauren Sánchez are set to tie the knot this week in Venice, Italy.

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• Jeff Bezos and Lauren Sánchez's Venice wedding this week is bound to be an extravagant affair.
• Though they have not shared much about the wedding, celebrations are expected to last several days.
• Luxury wedding planners told BI what goes on when the wealthy wed and how Venice poses challenges.

Many couples go all-out for their wedding. But what...