These six paintings are called “The Days of Creation.” The artist was Sir Edward Burne-Jones.
The first painting contains a single angel, and then the number of angels increases by one with each day, until there are six angels in the final picture. Jenny Morris, William Morris’ 15-year-old daughter, was the model for some of the angels.
If you embiggen the pictures, you might notice that the painting for the Fourth Day looks slightly off—it’s a bit less clearly the work of Burne-Jones than the rest of the cycle. That’s because Burne-Jones didn’t paint it.
The original painting of the Fourth Day was stolen—cut from its frame during a dinner party at Harvard in 1970, when the series was on loan from Harvard’s Fogg Art Museum. It has never been recovered. What you see now is a reconstruction, done by Kara Fraser and Christine Norstrand.
The paintings are still at the Fogg Art Museum.
Here’s a larger version of the first and last Days in the series: