diff --git a/data/sparql_templates.yaml b/data/sparql_templates.yaml
index 6a5be4907e..34c0a34358 100644
--- a/data/sparql_templates.yaml
+++ b/data/sparql_templates.yaml
@@ -1433,6 +1433,7 @@ templates:
     description: "Find organizational change events in a time period"
     intent: ["temporal", "statistical"]
     response_modes: ["table", "chart"]
+    databases: ["oxigraph"]  # Temporal event query - Oxigraph only, skip vector search
     ui_template:
       nl: "Gevonden: {{ result_count }} gebeurtenissen tussen {{ start_date }} en {{ end_date }}."
       en: "Found: {{ result_count }} events between {{ start_date }} and {{ end_date }}."
@@ -1613,6 +1614,7 @@ templates:
     description: "Count or list institutions by founding decade"
     intent: ["temporal", "statistical"]
     response_modes: ["table", "chart"]
+    databases: ["oxigraph"]  # Temporal aggregation - Oxigraph only, skip vector search
     ui_template:
       nl: "Verdeling van {{ institution_type_nl }} per decennium:"
       en: "Distribution of {{ institution_type_en }} by decade:"