diff --git a/lib/stac-loader/runtime/src/stac_loader/handler.py b/lib/stac-loader/runtime/src/stac_loader/handler.py
index 127dfe5..4bf2c86 100644
--- a/lib/stac-loader/runtime/src/stac_loader/handler.py
+++ b/lib/stac-loader/runtime/src/stac_loader/handler.py
@@ -19,6 +19,7 @@
 from pydantic import ValidationError
 from pypgstac.db import PgstacDB
 from pypgstac.load import Loader, Methods
+from stac_pydantic.catalog import Catalog
 from stac_pydantic.collection import Collection, Extent, SpatialExtent, TimeInterval
 from stac_pydantic.item import Item
 from stac_pydantic.links import Link, Links
@@ -180,7 +181,7 @@ def store_item_if_newer(
 
 def store_collection_if_newer(
     collections_dict: CollectionRecords,
-    collection: Collection,
+    collection: Collection | Catalog,
     message_id: str,
     sns_timestamp: datetime,
 ) -> None:
@@ -232,14 +233,17 @@ def process_record(
         if message_data["type"] == "Feature":
             item = Item(**message_data)
             store_item_if_newer(items_by_collection, item, message_id, sns_timestamp)
-        elif message_data["type"] == "Collection":
-            collection = Collection(**message_data)
+        elif message_data["type"] in ("Collection", "Catalog"):
+            collection_type = (
+                Collection if message_data["type"] == "Collection" else Catalog
+            )
+            collection = collection_type(**message_data)
             store_collection_if_newer(
                 collections_dict, collection, message_id, sns_timestamp
             )
         else:
             raise ValueError(
-                f"expected either a 'Feature' or a 'Collection', received a {message_data['type']}"
+                f"expected a 'Feature', 'Collection', or 'Catalog', received a {message_data['type']}"
             )
 
         logger.debug(f"[{message_id}] Successfully processed.")
diff --git a/lib/stac-loader/runtime/tests/test_stac_loader_handler.py b/lib/stac-loader/runtime/tests/test_stac_loader_handler.py
index ab793c2..f51795b 100644
--- a/lib/stac-loader/runtime/tests/test_stac_loader_handler.py
+++ b/lib/stac-loader/runtime/tests/test_stac_loader_handler.py
@@ -63,6 +63,17 @@ def create_valid_stac_collection(collection_id="test-collection"):
     }
 
 
+def create_valid_stac_catalog(catalog_id="test-catalog"):
+    """Create a valid STAC catalog."""
+    return {
+        "id": catalog_id,
+        "type": "Catalog",
+        "description": f"A test catalog with ID {catalog_id}",
+        "links": [],
+        "stac_version": "1.1.0",
+    }
+
+
 def test_get_pgstac_dsn_missing_env_var():
     """Test get_pgstac_dsn when environment variable is missing"""
     # Save current env var if it exists
@@ -1053,13 +1064,30 @@ def test_handler_with_collection_load_error(
     assert any(f["itemIdentifier"] == message_id for f in result["batchItemFailures"])
 
 
+def test_handler_with_valid_catalog(mock_aws_context, mock_pgstac_dsn, database_url):
+    """Test handler with a valid STAC catalog."""
+    catalog_id = "test-catalog"
+    valid_catalog = create_valid_stac_catalog(catalog_id=catalog_id)
+    event = {
+        "Records": [create_sqs_record(valid_catalog, message_id="test-catalog-message-1")]
+    }
+
+    result = handler(event, mock_aws_context)
+
+    assert result is None
+    stored_catalog = get_collection(database_url, catalog_id)
+    assert stored_catalog is not None
+    assert stored_catalog["content"]["type"] == "Catalog"
+    assert "extent" not in stored_catalog["content"]
+    assert "license" not in stored_catalog["content"]
+
+
 def test_handler_with_unknown_type(mock_aws_context, mock_pgstac_dsn):
-    """Test handler with unknown STAC type (neither Feature nor Collection)"""
-    # Create an object with unknown type
+    """Test handler with an unsupported STAC type."""
     unknown_object = {
         "id": "test-unknown",
-        "type": "Catalog",  # Neither Feature nor Collection
-        "description": "A test catalog",
+        "type": "Unsupported",
+        "description": "An unsupported STAC object",
         "stac_version": "1.1.0",
     }