Here are some pictures of the Main Branch:
When I first lived in Berkeley, this was painted a kind of salmon-pink. It was designed by the same architect who designed the North Berkeley Branch (pictured previously) and the Claremont Branch (pictured below). They refurbished the whole thing, inside and out, a few years ago, and added a wing.
This used to be the main entrance. There was a very fun curving double staircase with brass handrails inside. The main reading room, two stories tall, was to the left as you entered (up the stairs, of course) and the stacks were straight ahead. I loved the stacks: the silence of hours of quiet perusal of old books permeated the narrow alleys with their open-work floors and metal staircases.
The note of the exotic, necessary to good libraries, is present in these panels on the exterior of the lobby. Are they art nouveau? I'm sure this style of faux-egyptian decoration has a name.
Below is the library's modest insignia, which graces its buildings in several locations: