The Trinity Auditorium, Los Angeles, 1914-

The Trinity Auditorium, Los Angeles, CA, at the corner of 9th and Grand, later known as the Embassy Hotel.  Find more pics of the Auditorium here.  From Wikipedia, 

The Trinity Auditorium later known as the Embassy Hotel is a historic building in Los Angeles California.  It was built as a plant for the Methodist Episcopal Church, South, in 1914.  The Los Angeles Philharmonic debuted in this Auditorium in 1919.  It was used for jazz and rock concerts as well as labor union meetings from the 1920s to the 1950s.  It was an annex of the University of Southern California from 1987 to 1998 when it was sold to the New York-based Chetrit Group.  As of 2015, it has been vacant for more than a decade with plans to remodel it into a new hotel.  

1919, Photo of the Los Angeles Philharmonic Orchestra in the Trinity Auditorium, Los Angeles.  Thanks to LAPL.