In France this is traditionally baked at the beginning of January to celebrate twelfth night, when it is said the three wise men, or three kings, went to Bethlehem to see the newborn baby Jesus.
The baker usually places a small trinket inside, and whoever is served with the slice containing the trinket gets to be king (or queen) for the day. (Yes, each slice comes with a dental safety warning!)
My all-butter puff pastry encases a sweet frangipane filling. Although rum is traditionally added, I have instead chosen to add an appropriately middle-eastern flavour with orange blossom water. This has also been added, along with vanilla extract, to the stock syrup coating.