Fermat's Room
 Fermat's Room (Spanish: La habitación de Fermat) is a 2007 Spanish thriller film directed by Luis Piedrahita and Rodrigo Sopeña. Three mathematicians and one inventor are invited to a house under the premise of solving a great enigma and told to use pseudonyms based on famous historical mathematicians. At the house they are trapped in a room. They must solve puzzles given by the host who calls himself Fermat in order to escape the slowly closing walls of the room.