What year was the "Hollywood" sign erected?

The "Hollywood" Sign is an American landmark and cultural icon overlooking Hollywood, Los Angeles, California. Originally the "Hollywoodland" Sign, it is situated on Mount Lee, above Beachwood Canyon in the Santa Monica Mountains. Spelling out the word "HOLLYWOODLAND" in 50-foot-tall (15.2 m) white uppercase letters and 450 feet (137.2 m) long, it was originally erected in 1923 as a temporary advertisement for a local real estate development. Due to increasing recognition, the sign was left up, with the last four letters "LAND" removed in 1949. The sign was entirely replaced in 1978 with a more durable all-steel 45-foot-tall (13.7 m) structure and concrete footings.

Hollywood, sometimes informally called Tinseltown, is a neighborhood and district in the central region of Los Angeles County, California, mostly within the city of Los Angeles. Its name has come to be a shorthand reference for the U.S. film industry and the people associated with it. Many notable film studios, such as Sony Pictures, Walt Disney Studios, Paramount Pictures, Warner Bros. and Universal Pictures, are located in or near Hollywood.

Hollywood was incorporated as a municipality in 1903. The northern and eastern parts of the neighborhood were consolidated with the City of Los Angeles in 1910. Soon thereafter a prominent film industry emerged, having developed first on the East Coast. Eventually it became the most recognizable in the world.