The marmalade is made by the nuns of Santa Paula, from their orange orchard.
It is also well known in England. The Scots and English who came in the nineteenth century to the Rio Tinto mines exported the bitter orange to their country of origin and there, Seville jam (with Seville orange) was fundamental in the English breakfast.
The orange, or citrus aurantium, was brought the Arabs in the south of Spain. It is also used for perfumes, essences, confectionery and the orange blossom water has curative properties.
Finally, in China there is a belief that the bitter orange tree is a tree that brings happiness.