diff --git a/src/sphinxnotes/any/domain.py b/src/sphinxnotes/any/domain.py
index 1fde855..99d1947 100644
--- a/src/sphinxnotes/any/domain.py
+++ b/src/sphinxnotes/any/domain.py
@@ -14,20 +14,19 @@
 from docutils.nodes import Element, literal, Text
 
 from sphinx.addnodes import pending_xref
-from sphinx.domains import Domain, ObjType
+from sphinx.domains import Domain, ObjType, Index
 from sphinx.util import logging
 from sphinx.util.nodes import make_refnode
 
 from .schema import Schema, Object
 from .directives import AnyDirective
 from .roles import AnyRole
-from .indices import AnyIndex
+from .indices import AnyIndex, AnyTypeIndex
 
 if TYPE_CHECKING:
     from sphinx.application import Sphinx
     from sphinx.builders import Builder
     from sphinx.environment import BuildEnvironment
-    from sphinx.util.typing import RoleFunction
 
 logger = logging.getLogger(__name__)
 
@@ -41,14 +40,10 @@ class AnyDomain(Domain):
     name:str = 'any'
     #: Domain label: longer, more descriptive (used in messages)
     label = 'Any'
-    #: Type (usually directive) name -> ObjType instance
-    object_types:dict[str,ObjType]= {}
-    #: Directive name -> directive class
-    directives:dict[str,type[AnyDirective]] = {}
-    #: Role name -> role callable
-    roles:dict[str,RoleFunction] = {}
     #: A list of Index subclasses
-    indices:list[type[AnyIndex]] = []
+    indices: list[type[Index]] = [AnyTypeIndex]
+
+    # TODO: move to data?
     #: AnyDomain specific: type -> index class
     _indices_for_reftype:dict[str,type[AnyIndex]] = {}
     #: AnyDomain specific: type -> Schema instance
diff --git a/src/sphinxnotes/any/indices.py b/src/sphinxnotes/any/indices.py
index cbbe110..1ba26c7 100644
--- a/src/sphinxnotes/any/indices.py
+++ b/src/sphinxnotes/any/indices.py
@@ -81,3 +81,23 @@ def generate(self, docnames:Iterable[str]|None = None
         sorted_content = sorted(content.items())
 
         return sorted_content, False
+
+
+class AnyTypeIndex(Index):
+    name = 'type'
+    localname = 'Any Type Reference Index'
+    shortname = 'reference'
+
+    def generate(self, docnames:Iterable[str]|None = None
+                 ) -> tuple[list[tuple[str,list[IndexEntry]]], bool]:
+        """Override parent method."""
+        content = {}  # type: dict[str, list[IndexEntry]]
+        objtypes = sorted(self.domain.object_types.keys())
+        for objtype in objtypes:
+            entries = content.setdefault(objtype, [])
+            entries.append(IndexEntry(objtype, 0, 'any-'+objtype, '', '', '', ''))
+
+        # sort by first letter
+        sorted_content = sorted(content.items())
+
+        return sorted_content, False