King Juan Carlos (wearing the Order of Leopold and the Order of the Golden Fleece) and Queen Sofia of Spain (in the Order of Leopold) host a glittering State Banquet in honour of the State Visit of King Baudouin (wearing the Order of the Golden Fleece and the Order of Leopold) and Spanish-born Queen Fabiola of Belgium (in her Spanish Wedding Gift Necklace) at the Royal Palace of Madrid on this day in 1978.

Gianni Ferrari/Getty Images