An English gold coin of the value of twenty or twenty-three shillings. It was first struck in the reign of Charles I.

The carolus was a gold coin struck in the reign of Charles I of England. It was originally valued at 20 shillings, but later 23. The name has also been used for various other currencies bearing Carolus (Charles) as the name of the ruler."Carolus".

Carolus is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales. Carolus comprises six species of woody vines native to Mexico, Central America, the Lesser Antilles, and South America.