The cultivation of olives began in ancient Greece from Crete around 3500 BC , but soon spread to other areas.
Today , the olive tree continues to be one of the most useful trees because of the many benefits. The fruit is a delicacy unique to each kind of table , the oil is considered the richest and healthiest vegetable oil and is recommended in almost all diets , the wood is used both in carving and as fuel material , leaves fed to the animals for food while the kernel of the oil produced special purpose .