That neighborhood is called Portland and Westmoreland Place. It's on the same street, and about a mile from where I went to college. In the last year I rented a carriage house in there that was all remodeled. It took about three months for the cops and the private security to quit pulling my non-caucasian self over when I went in and out, but it's a beautiful little area.Must be a rare mansion estate within the city limits I'm guessing. Didn't know St. Louis city had estates like that, but guess I'm not too surprised since it was once a roaring powerhouse of a city decades ago.
There's maybe 100 houses hidden in there. It's a private section of an area with a whole lot of other big mansions. It's all built around Forrest Park, which was the site of the 1904 Worlds Fair. The object of Portland/Westmoreland is that every mansion is a slightly different style of architecture. The one I lived in was all red brick with a huge pool that was also all red brick. It was next door to this huge white stucco thing.
If you are a high-fallooting white person, it's a great place to live.