When the Pixar team set out to create a city of monsters, the possibilities were limitless. But they soon decided Monstropolis made more sense with a few facts: (1) Monsters have been around for as long as there have been frightened humans. The city should reflect this long history. (2) Monsters come in all shapes. Doors, telephones, and lockers must be usable by two-foot-tall monsters with tentacles as well as eleven-foot monsters with claws. (3) Most monsters are very heavy. The city would be built with strong, durable materials like brick, stone, and steel.