In English law, a fee simple or fee simple absolute is an estate in land, a form of freehold ownership. It is a way that real estate may be owned in common law countries, and is the highest possible ownership interest that can be had in real property. Allodial title is reserved to governments under a civil law structure. The rights of the fee simple owner are limited by government powers of taxation, compulsory purchase, police power, and escheat, and it could also be limited further by certain encumbrances or conditions in the deed, such as, for example, a condition that required the land to be used as a public park, with a reversion interest in the grantor if the condition fails; this is a fee simple conditional.