lso known as simply « incense ». They are the solidified resin small drops of a kind of tree that grows in Somalia, Yemen and other dessert zones. It is the unmistakable aroma of churches, familiar smell that evokes pureness and calmness.
In Arabian Nights, a peaceful atmosphere is created every time this incense is burnt. And when an image of a sensual woman and a musician is illustrated, usually an incense burner can be seen. 
French Crusaders brought the incense used today in Christian churches, so in English was called frankincense, incense of the French