# Immortal Object An immortal [[object]] are a [[CPython]] implementation detail introduced in [**PEP 683**](https://peps.python.org/pep-0683/). If an [[object]] is immortal, its [[reference count]] is never modified, and therefore it is never [[Allocation|deallocated]] while the interpreter is running. For example, `True` and `None` are immortal in [[CPython]]. --- Bibliography: - [Glossary, immortal - docs.python.org](https://docs.python.org/3/glossary.html#term-immortal)