[LIB3114] In 1960, it moved to a newly constructed "space age" facility at 311 E. 12th St., which it shared with the school district. [SOURCE] This is the building pictured on this postcard.
During the 1990s, Library administration became aware that it was time for another change in location for the Main Library. The 311 E. 12th St. facility, which it leased from the school district, was in a state of disrepair and the collection had once again outgrown its surroundings. In 1999, plans developed to relocate to the former First National Bank building at 10th and Baltimore. The century-old building, a true masterpiece of craftsmanship with its marble columns, bronze doors and ornate moldings, required remodeling and a fifth floor addition, but provided the framework for a modern and impressive urban library. [SOURCE]