With T117330: Solution of "unknown fields" from monument lists being solved and T176200: Add usage instructions to "unused images" reports being worked on is obvious that Commons:Monuments database/Unknown fields can be put to better use.

One solution is to rebuild it to look like Commons:Monuments database/Unused images with an explanation and usage instructions at that the top and statistics (with todays links) in the bottom. From the top of each country report a link to this page could be added.

Adding a link to the relevant row template to the top of each country report at the same would probably also make it easier for volunteers to discover if something is a typo or a newly introduced parameter.