This is an early regency style dress made by Jamiehistoriccostime. It has a high waist and cross-over style bodice.
Here's more information about cross over bodice dress by American Duchess.
I was at the Museum of Fine Arts in Boston, in the new Americas wing. It housed art from John Singleton Copley, John Sargent and much more. I'll have to go back to take photos. Anyway, one of my favorite pieces was a wedding gown circa 1799, in the Newport gallery. The plaque explained that diaphanous high-waisted, white flowing gowns where all the rage in Europe, reflecting a new interest in Greek and Roman styles. But in New England, the gowns were considered scandalous and too revealing. So this bride tried to be a bit more conservative, but still fashionable: