Profetas, Pórtico de la Gloria, Catedral de Santiago de Compostela (Spain).
Infanta Elena wearing the Marichalar tiara. The first and top level is of greek key motifs. The second layer is of ears of wheat motif. The third and bottom is of circle motif supported by a single row of diamonds. This tiara is a de Marichalar family heirloom and was given to Infanta Elena by her ex-husband as a wedding gift.
The Fleur-De-Lys Tiara is said to be the most cherished tiara of The Royal Family of Spain and only passes on from Queen to Queen. Description from theroyalforums.com. I searched for this on bing.com/images
In pictures: King Juan Carlos abdicates the Spanish throne
King Juan Carlos and Queen Sofia in an official portrait from 1978