I made this Google map with Columbus' historic buildings, most of which are on the National Register of Historic Places.  It's still a work in progress as this is only a small fraction of what exists, so it will take time to complete, but this is a good start so far.  Who says Columbus doesn't have history?

 

http://goo.gl/maps/HOJLi

 

I have also made a page on my site relating strictly to historic housing.  It's also incomplete, but it includes old and current photos of houses that exist and those that have been lost over the years. 

 

http://allcolumbusdata.com/?page_id=774

Awesome job.  Thanks for doing this.  Of the three-c's, I know the least about c-bus.

Incredible job.  Thanks!