Leighton House

Open House London gives the public access to buildings in London for free that might not be accessible otherwise, and takes place on a weekend in late September.
Dan and I went to Leighton House in Kennington.

"Originally the studio home of Lord Leighton, President of the Royal Academy, the house is one of the most remarkable buildings of 19C. The museum houses an outstanding collection of high Victorian art, including works by Leighton himself." - from the Leighton House Museum website

Unfortunately, we weren't allowed to take photographs but there are enough reference photos online.

This will be a great resource when designing sets from this period.