smithsonian by Jim / March 29, 2014 Post navigation < renovationsmithsonian > 2 Comments Ken March 30, 2014 at 10:54 am Reply I am just reading a book about how Roman arches led to vaulting, which led to domes. Before that it was all columns and flat beams. Cool roof. jim March 30, 2014 at 2:59 pm Reply Those Romans were darn clever. Leave a Reply Cancel Save my name, email, and website in this browser for the next time I comment.