It's our town's standard abbreviation, like a couple of more famous cities use LA and NYC. The airport code is STL. The initials in exactly this type have been on the Cardinals' caps for a century. It's even something of a motto for this blog.
This is a small plaza in the new part of Ballpark Village. The building in the upper right has luxury apartments. Who in their right mind would would want to live here, especially during a series against the arch-rival Cubs when beer soaked fans roam the area?