below: Here's a great building from 1913, The Trinity Auditorium.
The auditorium seated approximately 2500 spectators, and was the first home of the Los Angeles Philharmonic.
There were 330 rooms for single men from the fourth to the ninth floor.
It had a roof garden, ladies parlor, social halls, and a library.
Later, it became the Embassy Hotel and Auditorium.
It survives today, and is located at 851 S. Grand Ave.

USC digital archives

unknown. found at you-are-here.com

unknown. found at you-are-there.com
below: You can pick out the Trinity Auditorium in this vintage photo.
It's the building with the dome on the lower left hand side.
The other building with a dome on the right hand side is still a mystery to me.
Does anyone have a clue?

USC digital library