I love old houses and reading their histories. In fact, my favorite books revolve around the restoration of these grand old ladies with a romance or mystery thrown into the mix.
If you haven’t checked out the Louisiana Division of Historic Preservation’s National Register Database, you should take a tour! Here’s the link: https://www.crt.state.la.us/cultural-development/historic-preservation/national-register/database/index
You can search by parish and see all the structures on the National Register in a particular parish. You can also search by city, theme and even architect.
All of the files seem to have attachments. So you can look at documents, images and maps. You can also read about the history of the houses, courthouses, etc.