What is the first film in the history of cinematography shown in public?

The Lumières gave their first paid public screening on 28 December 1895, at Salon Indien du Grand Café in Paris. The Lumiere brothers unveiled their invention to the public with a brief film showing workers leaving the Lumiere factory. It is often referred to as the first real motion picture ever made, although Louis Le Prince's 1888 Roundhay Garden Scene pre-dated it by seven years.