This contest pairs up signature tiaras of two contemporary royal women…

This Spanish tiara has an important pedigree: it was a gift from King Alfonso XII to his wife, Queen Maria Cristina. The sparkler was sold when the family went into exile in the ’30s, but it was later bought back by Franco and given as a wedding present to Queen Sofia. Today, the classic diamond floral tiara is one of Queen Letizia’s signature pieces.

What could be more classic than a winding river of enormous diamonds? This bandeau was originally a necklace, given to Queen Emma as a wedding gift by the people of the Netherlands. Queen Wilhelmina had it transformed into a bandeau-style tiara, and it’s been worn by every Dutch queen since. The sleek bandeau, which includes more than 100 carats of diamonds, has become a particular favorite of Queen Maxima.