It was said to comfort the dead when it grew on their grave. If you anoint yourself with oregano before sleeping, you will dream of your future spouse. Sometimes it is difficult to determine which species is which. However, generally oregano has purple flowers while marjoram has white flowers, which is one way to determine which is which. Early Greeks and Romans crowned married couples with it.
Oregano is a symbol of honor.
Oregano supposedly contained Black Magic powers and special mystical secrets. Strewn on the ground, it will repel snakes. Said to ease toothache. Dried leaves mixed with honey, oregano will fade bruises. Keeps milk sweet, hence name Sweet Marjoram.