Approval.

kn/topic_object.php

@@ -0,0 +1,12 @@
+<?PHP
+declare(strict_types = 1);
+$topic = array (
+  'material_technique' => 'Material /Technique',
+  'measurements' => 'Measurements',
+  'when' => 'When',
+  'where' => 'Where',
+  'who' => 'Who',
+  'object_from' => 'Object from',
+  'original_entry' => 'Original entry',
+  'literature' => 'Literature',
+);