This is a place for discussions of history and historic preservation of old downtown Tucson and the five Historic Preservation Zones. I will publish articles here when it seems helpful. Useful material from others is welcome. Readers are invited to comment on posts regarding reasonable historic preservation, better understanding of our history and to serve the interests of old downtown Tucson residents. You may be invited to post here also; please let me know if you want to do so. Much of the research and descriptive text have been obtained with Perplexity AI. Feedback on incorrect information or site malfunctions will be very helpful.