I propose to film a portrait of the Natural History Museum London https://www.nhm.ac.uk/

I would film exteriors of the buildings - both wide shots and details of the materials with a focus on the limestone ‘Portland stone’ used in the buildings facade.

The Darwin Centre extension to the Natural History Museum is made from Portland stone, a pale limestone that's commonly used in London buildings.

The Jurassic section of the museum's garden also features Portland stone, which contains fossils of marine molluscs.

I would film mineral collections and fossil collections that relate to the buildings materials as well as preserved marine mollusc specimens in the spirit collection similar to those that may have created the limestone of the buildings facade. With a view to show a connection between deep time of ancient marine creatures, and the present  - the architectural building that houses these collections.