In 1897, when the Territory of Arizona was seeking to demonstrate its fitness for statehood, the legislature solicited bids to design a new capitol building and grounds in Phoenix. The winning entry was that of James Riely Gordon, the architect behind a number of well-regarded public buildings in Texas and Maryland. He drew up ambitious plans: an expansive dome, a grand rotunda, stately wings for each house. But funding fell short, and so the legislative wings were scrapped, and a diminutive lead-alloy top was chosen in lieu of Gordon’s more elaborate dome. Worse, in the building’s interior, a mosaic…