Last year's Oscar-nominated movie Conclave has become a big streaming hit in the wake of the death of the Pope. But how accurate is the film?

While any baptized Roman Catholic male is eligible, only cardinals have been selected as pope since 1378. The winner must receive at least two-thirds of the votes from those cardinals who are under age 80 and thus eligible to participate in the balloting.

For more than 750 years, strict rules have guarded what cardinals can and cannot eat to prevent hidden messages stuffed inside chicken, ravioli and napkins.