 De Heeren collected jewelry and was fond of the empress as both were considered to be the "Queens of Biarritz"; both spent summers on the Côte Basque.Impressed by the elegance, style and design of the jewelry of the neo-classical era, in 1858 she had a boutique in the Royal Palace under the name Royale Collections.She was honoured by John Gould who gave the white-headed fruit dove the scientific name "Ptilinopus eugeniae".