This is my modular model based on the Monolith from the Stanley Krubrik classic, 2001: A Space Odyssey. This is the second Monolith seen in the film which is found by the astronauts, the model has the recognisable details from the scene.
The set would include 2 pins, as this is in a series of three and the base allows for more connections, the main 'architecture', the Monolith and three astronauts, as seen in the film.