Although it initially flourished, interest dwindled by the beginning of the 20th century, and it saw increased usage as a public meetinghouse and theater.

However, efforts to establish a library quickly redoubled; in 1904, a small organization established the Rapid City Free Library and a reading room in a corner the Flormann Building.

J. N. Fitzgerald all delivered commemorative speeches, followed by a performance by the city's high school orchestra.

It briefly hosted the city's police department while their new headquarters were being built but was disused again by 1981.

Its central entrance is sheltered by a portico topped by a pediment, with five total window bays on either side.

The 1938 WPA expansion is identical in style to the original 1915 building, although the added wings are slightly recessed.