| 1925 |
 |
February 28: The exterior of central library is completed |
|
 |
July 29: The contract for the interior of the central library is awarded to F.
W. Mark Construction Company for a bid of $2,417,241 |
| 1926 |
 |
July 8: Horace Trumbauer completes the final revisions to the central library
design |
|
 |
October 30: The old Central Library at Thirteenth and Locust Streets closes |
| 1927 |
 |
January 20: The first books are moved into the Central Library |