I apologize for taking so long to reply. Thank you all for the help. I've attached 3 additional pictures. Based on an old photo, I think the tree was planted in the mid-1970s but, at some point, someone cut it down and it grew back with 3 trunks, instead of 1. We are working to have the building listed on the state and national historic registers, and the SHPO is concerned that the tree's proximity to the building may cause damage (roots lifting the foundation and canopy trapping moisture against the stucco).
In spring, the flowers soon give way to green leaves. The tree does not bear fruit. If I missed any questions already asked, please let me know.