diff --git a/Doc/c-api/concrete.rst b/Doc/c-api/concrete.rst
--- a/Doc/c-api/concrete.rst
+++ b/Doc/c-api/concrete.rst
@@ -106,3 +106,21 @@
    gen.rst
    datetime.rst
    code.rst
+
+SimpleNamespace Objects
+-----------------------
+
+.. sectionauthor:: Eric Snow <ericsnowcurrently@gmail.com>
+
+A :class:`~types.SimpleNamespace` object is a basic subclass of :class:`object`
+that supports a writable namespace by virtue of having a :attr:`__dict__`
+attribute.  It also provides a helpful repr.
+
+.. c:function:: PyObject* PyNamespace_New(PyObject *kwds)
+
+   Return a new :class:`types.SimpleNamespace` object on success or *NULL* on
+   failure.  If *kwds* is NULL, the new ``SimpleNamespace`` object will be
+   empty.  Otherwise, it is populated with the contents of *kwds*.  *kwds*
+   may be anything that :func:`PyDict_Update` accepts.
+
+   .. versionadded:: 3.3
diff --git a/Include/namespaceobject.h b/Include/namespaceobject.h
--- a/Include/namespaceobject.h
+++ b/Include/namespaceobject.h
@@ -7,9 +7,9 @@
 extern "C" {
 #endif
 
-PyAPI_DATA(PyTypeObject) _PyNamespace_Type;
+PyTypeObject _PyNamespace_Type;
 
-PyAPI_FUNC(PyObject *) _PyNamespace_New(PyObject *kwds);
+PyAPI_FUNC(PyObject *) PyNamespace_New(PyObject *kwds);
 
 #ifdef __cplusplus
 }
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -1226,7 +1226,7 @@
         goto error;
     Py_CLEAR(obj);
 
-    ns = _PyNamespace_New(dict);
+    ns = PyNamespace_New(dict);
     Py_DECREF(dict);
     return ns;
 
diff --git a/Objects/namespaceobject.c b/Objects/namespaceobject.c
--- a/Objects/namespaceobject.c
+++ b/Objects/namespaceobject.c
@@ -208,7 +208,7 @@
 
 
 PyObject *
-_PyNamespace_New(PyObject *kwds)
+PyNamespace_New(PyObject *kwds)
 {
     PyObject *ns = namespace_new(&_PyNamespace_Type, NULL, NULL);
     if (ns == NULL)
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1532,7 +1532,7 @@
 
     /* dict ready */
 
-    ns = _PyNamespace_New(impl_info);
+    ns = PyNamespace_New(impl_info);
     Py_DECREF(impl_info);
     return ns;